Service Manuals, User Guides, Schematic Diagrams or docs for : Dell hack-password-bios-laptop-dell
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Disclaimer
This information is provided as an "At Your Own Risk" procedure. I can not absolutely assure that it is
safe for any or all equipment, with any make of materials, or under any or all environmental or working
conditions. If you perform this procedure on a product belonging to you or another person, you do so
at your own risk and liability. Also you are responsible for taking any safety precautions that may be
necessary to protect yourself and the equipment you may be working on, or which may subsequently
be affected by this procedure. You are also responsible for any breach of law or contract which would
occur by your decision to undertake this procedure.
This information and procedure are not sponsored, endorsed, authorized, or condoned by; and are
probably criticized or condemned by any and all of the following: Dell; any of their affiliates; any other
manufacturer of laptops, electronic devices or equipment, screwdrivers, or paperclips.
Also; I can not be held liable for any ill effects brought about from natural responses of humor resulting
from reading of this site, or its content, regardless of the form of humorous reaction. This shall include
but not be limited to: laughing, chuckling, giggling, or snorteling.
Helpful Links:
http://support.dell.com/systemdocumentation/index.aspx?category=12,86
http://support.dell.com/systemdocumentation/index.aspx?category=12,87
http://digitaltv4free.tripod.com/dell/latitudeD35B.zip
http://digitaltv4free.tripod.com/dell/service_tag.zip
http://digitaltv4free.tripod.com/dell/bootcd.rar
http://homepage.ntlworld.com/judslat/paragon/software.html
There are a lot of people who have a dell or similar laptop that they are not able to use because of a
special password chip that can't be cleared by resetting the CMOS.
Dell will not give any help to these people without verifying that they are the original and registered
owners of these laptops. Their justification is that it is part of their security / anti-theft program, and
keeps people from stealing their laptops or accessing their data.
There are however, several reasons that this is an extremely unrealistic approach to the matter of
laptop theft.
Many legitimate possessors of a laptop may:
Be original owners who neglected to register with Dell.
Have lost all the paperwork pertaining to their ownership
Have bought it second hand from an original owner.
Received it from their employer, and changed jobs.
Bought it through a commercial or government liquidation sale.
Bought it off of eBay or another auction site.
Either legitimate or stolen, this would not be the fault of the possessor.
Received it as a gift from a parent, spouse, friend, etc...; whom is dead, estranged,
unreachable, etc...
This password system does not prevent theft because:
When stealing a laptop, either off a park bench, while slipping into an office,
breaking into a home or car; a thief will not pull out their handy 'list of laptop
models that are protected by an irremovable password", and leave the notebook there.
Thieves steal according to opportunity, and even if they are aware that a laptop might be
protected by a password, they will likely steal it anyway. If they can't break the password, they
can just throw it away, as it did not cost them anything, and has no investment value to them.
It also does not increase the likelihood of catching thieves, or the return of a stolen laptop
because:
Stolen laptops are often stolen along with other belongings which could likely include the
original owner's identity and/or paperwork regarding the laptop.
A thief who finds that the laptop they have stolen is protected by a password will not feel
remorseful at this barrier, and seek out the legitimate owner so that they can return it.
If a thief should call Dell and be unable to provide ownership information and the technician
logs their caller ID, and reports it to the authorities:
This is hardly grounds for a search warrant.
By the time any action might be taken by police; the thief will likely have given up on the
laptop and gotten rid of it, or passed it along to someone else. There will be no evidence,
and no returned laptop.
If authorities confiscate a laptop which they believe is stolen:
They may or may not be aware of their ability to find the owner through Dell.
The owner may never have registered.
They may not initially be believed by Dell tech support and decide not to press the matter.
It also does not prevent the data on the laptop from being accessed because:
Anyone who has the laptop in their possession can remove the hard drive in about 10
seconds, put it in another laptop or computer (or copy it to another hard drive) and access it.
These laptops, to my best knowledge, come equipped with the ability to enable a Hard Drive
password. This is what hard drive passwords are for! If the hard drive password is
enabled, regardless of its circumventability, a second password will not make the data super
secure. If one password can be thwarted, then 2 can be as well.
So we are left with the stark realization that Dell's password security scheme is nothing more than a
selling point. Something that will cause someone to buy one of their laptops, instead of another brand,
because of a perceived safeguard - which is in reality, nothing more than ineffectual hype.
The purpose of this site is to show you how, if need arises, you can negotiate past this purportedly
intricate and nearly foolproof security measure using nothing more than the devices in this picture:
1. The laptop
2. A small screwdriver
3. A paperclip
The following pages will show you how this can be done; in a step by step breakdown, with
photographs of the actual process. At no charge to you.
Introduction
An explanation of what's going on with the laptop.
This is the prepatory section where I explain some things about the chip, CMOS, asset and service
tags, and passwords; so that you will have a good grasp of the big picture.
Hopefully it will also clear up any thing you have gotten a vague idea about on another website.
All computers have special chips inside them that store information about the computer.
Some of them are manufactured with permanent information that can not be changed (and, as a rule,
all have exactly the same information on them; thus not for passwords.) These contain information
about the computer model or are part of its functional circuitry.
Another type of chip (the kind we are interested in) is manufactured with a blank information area that
can be programmed or filled with information. These chips are commonly used to store settings and
passwords; and come in 2 basic sorts: VOLATILE and NON-VOLATILE.
VOLATILE chips use a source of electricity to help them keep their information, such as a battery.
They are less expensive and are used to store computer settings, and also passwords on most
computers. If one of these chips has a password on it, the battery can be removed and after a time
(between 2 seconds to 30 minutes, depending on the chip) the password will be erased.
NON-VOLATILE chips do not need electricity to keep their information, but are more expensive. If
there is a password on one of these chips, it can be removed from power for years and still have the
password on it. (However this does not mean that it is permanent.) Remember that the information on
Non-Volatile chips can be filled with information. This information can also be changed or erased.
If you have read this far you probably own a Dell or similar laptop with a password that is obviously
stored in a Non-Volatile chip, or are an employee of a company that makes one. These laptops have
most of their setting information stored in Volatile (inexpensive) chips, and their passwords are stored
on a tiny Non-Volatile (more expensive) chip.
The chip that Dell uses is called a 24C02 chip.
This is the Chip Type number used to refer to the chip's design in the electronics industry.
The 24C02 is a small, rather common surface mount* dip* chip with 8 leads (or legs), which costs
about $5. It measures 4.5 mm long x 3.5 mm wide x 2 mm tall, and stores 256 Bytes (or one quarter of
a Kilobyte) of information. It is commonly used in modems, DIMM Memory, and other electronic
devices; and in a different shape it is used in many wallet sized "smart cards." * SURFACE MOUNT
means that the chip is soldered onto the surface of the printed circuit, instead of having pins sticking
through the board. This is the most difficult type of circuitry to solder by hand.
* DIP means 'Dual Inline Package'. This means that the chip has 2 rows of leads (or legs) in straight
lines running down its sides.
That's the chip we will be dealing with, if you would like to know more about the chip, click here, or
read the "Some unnecessary information about the chip." section later on.
The laptop that was used in this demonstration is a Model 630 type PPX. Other laptops may be
different from the one shown in the full breakdown demonstration photos.
If a certain laptop does not correspond to any of these diagrams, more information might be found on
the web, or, anyone not reading for informational purposes only - could decide to simply "Wing it."
Also, the chip containing the password may be in a different location on some motherboards, but it
should be able to be found by reading the numbers on the top of the chip, although a magnifying glass
might be necessary. Take out the hdd and use a ac adapter!
Model / Series Typ Chip Clears Comments
Latitude XP ? not tested no Info
The EEPROM chip 24c02 is on the backside
Latitude XPi Yes Yes of the motherboard behind the PCMCIA
slots. Short circuit Pin 3 and 6 wile booting
Latitude CP Yes not tested no Info
Latitude CPi Yes Yes You have to solder two smal wires
The Chip is on the top side of motherboard,
Latitude CPiA Yes Yes under MMC2 processor module. You have
to solder two smal wires
Latitude CPx Yes Yes Picture included.
The Chip is on the top side of motherboard,
Latitude CPxJ Yes Yes
under MMC2 processor module.
the 24C02 chip is located between
Latitude CS ? not tested
Neomagic chip and ram slot
the 24C02 chip is located between
Latitude CSx Yes Yes
Neomagic chip and ram slot
Latitude c400 Yes Yes Picture included.
The Chip is on the bottom side of
Latitude c500 Yes Yes
motherboard, under the PCMCIA card slots.
The Chip is on the bottom side of
Latitude c510 Yes Yes
motherboard, under the PCMCIA card slots.
The Chip is on the bottom side of
Latitude c600 Yes Yes
motherboard, under the PCMCIA card slots.
Latitude c610 Yes Yes Picture included.
The Chip is on the bottom of the
Latitude c640 Yes Yes
motherboard just to the left of DIMM 1.
Latitude c800 Yes not tested no Info
c810
Latitude Yes Yes Picture included.
c840
Latitude L400 Yes Yes remove CMOS Battery for 5 minutes.
Latitude D400 Yes Yes Picture included.
Latitude D410 Yes Yes Picture included.
Latitude D500 Yes Yes Picture included.
D505
Latitude 24c04 Yes Picture included.
D510
Latitude D600 24u05 Yes Picture included.
Latitude D610 24u05/04 Yes Picture included.
D800
Latitude Yes Yes Picture included.
D810
110L
Latitude Yes Yes Picture included.
X1
Inspiron 2650 ? not tested no Info
24c04 eeprom is under a piece of black
Inspiron 510m Yes Yes
sheet under the pcmcia socket
A program called KILLCMOS.EXE is
Inspiron 3200 Yes No
reproted to work for this laptop.
Inspiron 3500 24c164 Yes Picture included.
The Chip is on the top side of motherboard,
Inspiron 3800 Yes Yes
under MMC2 processor module.
The Chip is on the bottom side of
Inspiron 4000 Yes Yes
motherboard, under the PCMCIA card slots.
Chip is on the back side of the
Inspiron 5100 Yes Yes
motherboard, close to the DRAM slots.
Inspiron 7000 24C164 No no Info
Inspiron 7500 Yes not tested no Info
Inspiron 8000 Yes not tested The chip is under the CD-ROM
8100
Inspiron Yes Yes Picture included.
8200
Inspiron 8500 24c04N Yes Picture included.
Inspiron 8600 Yes Yes Picture included.
Chip is on the bottom of the board. 24c168
Inspiron 1100 Yes Yes
is near the B ram connector
1200
Inspiron Yes Yes Picture included.
2200
XPS Gen2
The chip (C24O4N) is located on the bottem
Inspiron M170 24C04 Yes of the laptop right next to the two DIMM
slots
9300
Now we are informed and ready to begin. Anyone attempting this procedure should have the
implements shown in this picture, along with any others they may deem needful or useful.
They may also wish to write down the Service Tag number for later use, as it will be erased.
Laptop - Screwdriver - Paperclip
And remember, when using a screwdriver, it's "righty - tightey, lefty - loosey."
* NOTE:
There are a few things that should be addressed before you continue...
I will list them quickly here.
Some of these laptops may have an additional password called a "Hard Drive Password."
This may not even become evident until the other passwords have been cleared. This password is
stored on the hard drive, it does not mean that the laptop can not be used; it just means that the hard
drive can not be accessed.
If you are not able to find out what the Hard Drive Password is, you can simply replace it with
another Hard Drive, and then reinstall windows. (I'm assuming you choose windows; linux, solaris,
or DOS are fine too.)
Also: I do not know how to bypass, circumvent, or clear the hard drive password.
Step
One
Taking
it
apart
This is the first step in the procedure; and demonstrates how the laptop is prepared for disassembly,
and begin the actual disassembly process.
For this particular laptop, a size 0 PhillipsTM screwdriver is recommended. Other models may require a
different size or type.
*note: These photographs show the procedure being performed without any special devices or
methods used to prevent or reduce the risk of either personal injury or damage to the device; such as
safety goggles, electrostatic wrist bands.
It is not the purpose of this website to promote, assure, or condone this or any procedure as being
safe or reasonable without the use of such devices or methods. Anyone performing this or any similar
procedure is responsible for seeing to the safety needs of and resulting from such a procedure.
Furthermore, on the subject of Electrostatic Discharge (ESD,) and potential damage to computer chips
or circuitry: During the past 5 years that I have worked as a computer technician, apart from volatile
memory (SIMM / DIMM modules,) I have never needed to use ESD reducing devices, nor known any
computer device to fail due to the effects of ESD from handling or use without ESD reducing
equipment. This may, in part, be because I live in an area where the average humidity is around 70% -
80%. I understand that increased humidity tends to lower ESD effects, while lower humidity tends to
increase this. Anyone deciding to perform this procedure must make their own decisions about the
importance of ESD in their environment and the need for special devices or procedures.
(Remember that SIMM / DIMM memory modules / sticks are always extremely susceptible to ESD
damage at any humidity, under any environmental conditions, and should always be handled with the
utmost care and precaution against damage.)
The first thing that needs to be done, is the removable of any batteries, floppy drives, CD-ROMs,
PCMCIA cards, or other removable / swappable components of the laptop. Also the power cord /
adapter should be disconnected. One may, or may not want to remove the RAM, depending on
personal preference.
If possible, the hard drive should be removed as well.
First the hard drive retaining screw is removed like this:
The hard drive caddy cover is pressed down (towards the bottom of the laptop,) unlocking it.
The hard drive caddy is pulled and slid outwards until it is free from the laptop assembly.
The next thing that needs to be done is the removing of the keyboard. (This particular model)
The keyboard is released from the rest of the assembly by the removal of 7 screws on the bottom of
the laptop. These are indicated here by blue arrows:
They are also indicated on the bottom of the laptop by a circle with the letter 'K' inside of it next to the
location of each screw.
The keyboard is then lifted upwards and out of the main laptop assembly, except for 2 thin connection
cables. The keyboard can then be lain perpendicular to its original position so that these cable's
connectors can be accessed.
The larger cable pictured here can be pulled straight up, disconnecting it from the main board.
The retention clip of the smaller cable must be pressed on both sides (in the direction of the cable)
gently. It should not be forced, and when open, will still be attached to the main connector, but be
moved approximately 1 - 2 mm from its original position.
The cable can then be pulled from the connector.
Step Two
Taking it apart, continued.
The rest of the disassembly process.
The next thing that needs to be done is removing of the palmrest. (This particular model)
The palmrest is released from the rest of the assembly by the removal of 5 screws on the bottom of
the laptop. These are indicated here by red arrows:
They are also indicated on the bottom of the laptop by a circle with the letter 'P' inside of it next to the
location of each screw.
The electronic components of the palmrest are disconnected from the main circuit by pulling this tab,
which contained one of the keyboard connectors on it, straight up away from the main circuit board.
Also, if the CMOS information needs to be cleared for any reason, it can be done by disconnecting this
connector for only a few seconds. This is because the battery is located in the palmrest just above the
right speaker (at least on this model.) And because this particular CMOS chip doesn't hold its data
very long without a battery, and is located on the main board.
I personally found this to be somewhat odd.
Now the latch pictured here must be released from its hold on the bottom of the case. I used a small
flat screwdriver to gently pry it back while easing the front of the palmrest upwards. Be careful not to
lift the palmrest up too much, as there are still 2 more hitches securing it to the rest of the case.
There are 2 latches, one on each side of the palmrest. They are towards the back of the palmrest,
near the screen. They can be unhooked from the main assembly in the manner shown in this picture,
by lifting the corner of the other section of the case up about a millimeter. After both of these are freed
the palmrest can be lifted away.
The official repair manual for this laptop stated that the display must be removed before the palmrest
can be taken off. But, as you can see, for anyone who is mechanically inclined enough to be able to
cross a country road, this is not actually necessary. (Although this procedure does require the removal
of the screen, which is next.)
The first thing that needs to be done when removing the screen is to disconnect this ribbon cable from
its connector on the motherboard by pulling it upwards. This is the only electronic connection that the
screen has with the rest of the notebook.
To release the screen from the main assembly, the 3 screws shown here by red arrows, and also by a
circle containing the letter 'D' next to each screw.
Make sure you keep track of all screws, put them in something, and keep track of which ones go
where.
After these screws are removed, the screen can be lifted straight up and away.
The motherboard is the next part to be removed. This model has 2 screws fastening the motherboard
to the case as shown in the picture. There are 2 more photos following, which show close-ups of each
screw to avoid any confusion. They are shown by red arrows in the photographs. But, unlike previous
screws, they do not have a convenient circled letter next to them.
* For this model, these are the only screws that need to be removed on the motherboard! There are
other screws which may look as though they need to be removed, such as the ones by the processor
or fan but these should not be removed.
Remember to check the next 2 pictures first.
The screw on the right.
The screw on the left.
The motherboard is now released from the bottom of the case and the unit is placed in its normal
position on a flat surface.
Applying a steady gentle lifting force under the middle fore section of the motherboard causes it to
swing up.
And then it can be lifted straight up and away from the bottom of the unit's case.
Step Three
Reorienting things just a tad.
In order to clear the password on the chip, some of the laptop must be put back together. This is
because the laptop will need to be powered on during the process. Seeing how easy it was to
disassemble, this is not a difficult task.
This page shows how this part of the procedure is done, and the next page is where the real action of
actually clearing the password takes place.
First the display screen must be put back on. This can easily be done by holding it in this manner and
setting it into its slot.
Then it must be held in place with screws, one on each side as shown in this picture should be
sufficient to hold it.
Up to this point we have something that looks like this:
Now the palmrest is be put back on.
The video connector is plugged back in.
And the palmrest connector is also plugged back in.
The keyboard is also reconnected.
The smaller Keyboard cable is slid back into its connector, and is held fast by closing the connector as
shown is this picture. The larger cable is then gently pushed back onto its connector.
The keyboard is placed back in its seating, like this:
And finally, this one screw is used to hold the keyboard in place while the work of clearing the
password is performed.
Now the laptop is ready to and there is free access to the password chip which is located on the
bottom of the motherboard.
Now, you are probably thinking to yourself 'Wait a minute! I just put almost the entire laptop back
together! The wascally wabbits that made this thing sure made it difficult to get to that chip!'
OK, so, you're probably not thinking the part about 'Wascally Wabbits'; but, yes, this is somewhat of a
study in redundancy. The good news is that it's almost done. Nothing more has to be bought,
soldered, or disassembled.
Culmination
Actually doing the deed.
This is the page that you all came here for.
Where we get down to business, and "Do it."
An enigmatic French invention, The Paperclip, will be used to master and overwhelm the
power of one of the marvels of today's cutting edge technology, the microchip.
First the paperclip which was requisitioned at the beginning of the procedure is gotten in hand; if it has
not been lost or misplaced by now, otherwise another conveniently available paperclip is used.
The paperclip is then unbent and, stripped of its paper-clipping function, is reformed into a totally new
implement which looks like this:
Next, the location of the actual chip is sought out.
It is located here on this particular model.
A closer look.
And the best shot I could take showing its location.
Now that the chip has been located, a closer look must be taken at the actual chip itself. This is both
because this procedure will involve working rather closely with certain leads / legs on the chip, and
because the correct identification of the chip in question should be verified before anything further is
done.
Also if this particular model of laptop is different from that may be being worked on, the chip may be in
another location and a good view of what it looks like will aid in being able to find it.
Here are 2 close up views of 24C02 chips.
The arrows indicate which pins / leads will need to be jumped with the paperclip.
This is roughly what the 24C02 chip will look like on your motherboard. The letters or precise
arrangement or numbers / letters may be different. But, you will be able to see (possibly with a
magnifier) that on the top row, 24 and C02 are printed, possibly along with other letters or numbers,
depending on the manufacturer, or series of the chip.
You can use the direction of the writing and / or the location of the small indented spot shown in the
bottom left hand corner of each chip to identify which pins / leads need to be jumped in order to clear
the chip.
The paperclip will be used to jump (or make a temporary electrical connection) between these 2 pins
of the chip, as shown here:
You should be able to see that these are the same 2 pins which were indicated by red arrows in the
previous pictures of the chips.
Now the power adapter is plugged in and connected to the laptop, but the laptop is not powered on
just yet.
With the laptop open at roughly a 90 degree angle, and lying on it's back, the 2 indicated pins are
jumped (or connected by touching one with each end of the paperclip) while the power button located
on the other side, near the keyboard, is pressed, turning it on.
The laptop will turn on, and a screen like this should appear. Fn-X may be pressed if desired. Also,
setup may be entered by pressing F2. And the paperclip, if it hasn't already been removed, should be.
It is now possible to enter setup and change all the values.
Also note that all system passwords have been cleared.
But you can not use the password feature anymore, because the chip has been cleared of its
information. This seems to be another not very well thought through security feature. The next page
will show how the chip can be reprogrammed to allow the password feature to be used, if so desired.
* Hard disk drive passwords are not cleared or removed by this procedure.
The task having been accomplished, the laptop is now reassembled in the reverse of the disassembly
process. Note that not all screws are interchangeable, and care is taken to put the right screw in the
right place.
Afterwards
So, now you want your own password.
This page will show how a new password can be set and everything returned to normal.
Now that the laptop has been cleared of the password, the primary and administrative password fields
in setup both show disabled.
But, on the right side of this screen, it can be seen that the option to set either of these password has
been removed, due to the lack of a Service Tag.
So, now you want to set your own password for the laptop. After having read all of the reasons why
setting a password will not prevent theft or access to the laptop or data, and after demonstrating how
such a password can be removed, it seems rather ironic. But there may be reasons why you would
want to do so.
First, though, it would probably help for me to let you know what a Service Tag is and what it does.
And also, tell you about Asset Tags and Owner Tags.
The chip which was just cleared during the procedure had some information on it, as I am sure you
know by now. Naturally, it contained the passwords, Primary and / or Administrative.
It also contained 3 other pieces of information, which are referred to as 'Tags.'
* As far as I know, these tags are only used for dell laptops.
The Service Tag is a combination of letters and numbers that uniquely identify a particular computer,
somewhat like a serial number. It is used by Dell technical support to be able to identify a particular
computer when someone calls them. This tag is a 7 letter field. It would have been the first 7 letters
(before the dash '-') which were displayed when the laptop started before the chip was cleared. This
tag may be filled with any combination of numbers, letters, and some punctuation marks.
* Once a new service tag is set, I do not think it can be changed without clearing the chip again.
The Asset Tag is for laptops that are owned or distributed by a company for company and / or
employee use. It is so named because these laptops are part of the company's assets. This helps the
company keep track of, and identify their laptops. This tag can contain up to 10 characters, and
companies usually use the same tag for all their laptops or use a sequence of numbers like a serial
number for each one.
The Owner Tag is used to display information about the owner of the laptop. This tag can contain up to
48 characters, including, spaces; and, unless it is empty, it is always displayed on the logo screen
when the laptop is started up. If you are going to use this tag, I would suggest using your name, or
your full name and address.
These tags can be created or changed with a small DOS program called ASSET.COM that has to be
run in full DOS mode, I.E.: from a DOS boot diskette. And, it can be downloaded for free, along with a
whole bunch of other neat files, from the DellTM FTP site: ftp://ftp.us.dell.com/utility/
If you are not able to directly browse FTP directories, it can be downloaded directly:
ftp://ftp.us.dell.com/utility/asset.com
And, finally, if you are unable, or do not know how to make a DOS boot diskette. The file
ASSETA00.EXE can be downloaded. It will automatically make a DOS boot disk with the asset utility
on it. ftp://ftp.us.dell.com/utility/asseta00.exe
I should hope that anyone who, despite the numerous cautions and warning, has decided to take it
upon themselves to actually perform this procedure would be knowledgeable enough about computers
to know how to boot a computer using a boot diskette. However; if you have come to this point, and do
not, it is beyond the scope of this demonstration to explain. You will have to find other sources for this
information.
By typing 'asset' or 'asset /?' at the DOS prompt, you can get a reference for using asset.com to view,
change, or delete the Asset Tag and Owner Tag by using the '/a' and '/o' switches.
Obviously this is all well and good, but does nothing about the Service Tag.
There is an undocumented command switch which you can use with asset.com. It is the '/s' switch,
and works exactly like the '/a' and '/o' switches.
Thus, the command:
ASSET /s XXXXXXX
Will create the Service Tag represented by the X's.
Remember, this can only be done once without clearing the chip again.
Once the Service Tag is in place, the BIOS setup can be entered, and a primary and / or
administrative password can be set.
That pretty much wraps it up. If you are not thoroughly bored by now, you can read the last page. It
has some information about the chip that you really don't need to know. (Unless you actually need a
new chip for some reason.)
Inspiron 8100 8200 / Latitude C810 C840
Disassembly of the Inspiron 8100/8200 can be accomplished rather easily. The only external
component necessary to remove is the keyboard. The screws shown by the blue arrows need to be
removed from the bottom of the case. For clarity, they are marked on the case by an encircled 'K', to
differentiate them from screws for the palmrest, display, and memory. (Luckily, the original creators of
the laptop did not give all these parts names beginning with the same letter.
It's always a good idea to put small screws into some sort of container to keep them from being lost,
so they can be used to put it back together. A closeable container works best, especially for projects
that can extend more than one day. As you can see, here I've recycled this wood screw container.
Next all the drives are removed. Battery and/or Floppy from the front. The CD or DVD drive must be
removed because the chip is underneath of it.
The CD or DVD drive is removed by pulling on this handle (which may be held in by a screw.)
The hard drive cover is locked in place by a double locking mechanism. First a screw is removed from
the hard drive cover.
Second, the cover is slid towards the bottom slightly, both unlocking it and creating a handle, by which
it can be pulled out of the laptop.
Removing the hard drive will prevent any erroneous information that may develop while working with
the chip from causing a password to appear on the hard drive, or from changing an already known
hard drive password.
Next the keyboard is lifted up from the corner, pulled up and off, and laid to the side. It is not
necessary to remove the keyboard completely.
(However if working conditions require it, it is possible to remove the entire keyboard by disconnecting
2 ribbon cables that plug into the main circuit board.)
The power button/LED display panel is then removed by gently popping it up on both sides, and lifting
it off.
From here the chip may be accessed in somewhat cramped conditions if further disassembly is not
considered prudent. (Further disassembly shown farther down the page.)
(The preceding 2 photos not taken by me)
A few helpful people have sent in these pictures to assist in finding the chip on this model. Once the
keyboard and CD-Rom unit are removed, the chip can be seen located just under the lip of a piece of
metal which is part of the cage that the CD-Rom slips into.
Further Disassembly:
In order to remove the DC-Rom cage, a few more screws are removed; and kept track of.
The blue arrows indicate screws that must be removed. The red arrows indicate the location of latches
holding the cage onto the motherboard which are carefully pried slightly sideways to free them. (As
shown below.)
The cage can then be lifted up like this...
and then finally pulled out, revealing the chip
The following 2 pictures show the location of the chip.
As show here, the chip can easily be accessed and jumped. This arrangement also offers the best
chances for removal and replacement.
(Actual chip may look different. This picture simply shows the proper orientation.) In order to turn the
laptop on while jumping the chip with a paper clip; the power circuit board must be replaced, and the
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