Question about IBM ThinkPad T42 Notebook

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The cpu fan has quit working, looking for instructions to replace the fan

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I can give you instructions, finding a replacement fan might be a little tough.
(Unless you have a good source, in this case Everybody Shares! Lol!)

IBM ThinkPad Service Manual, Free. (But the author indicates donations are welcome. {I'm going to have to do that one day!)

On this page go down to the 8th ThinkPad line. Go across, and left-click on > T42

This is a PDF file. (Don't shoot the messenger if you are aware of the following)
The computer you are on now has Adobe Reader on it which uses PDF files.
I would suggest however, that you should upgrade, (Free), to Adobe Reader 9.4 if you do not have it.

After you click on the t42 file name it will take a few seconds before you see the first page. It will also take additional time to fully download. Suggest you let the file download all the way, before looking through it.
(2 seconds to see the first page, an additional 48 seconds to fully download just now)

[You can save this PDF file to your computer. This way you can copy it to CD disk for safekeeping, and delete it from your computer to save Harddrive space. If you do not know how, and wish to, please post in a Comment ]

In the Bookmarks menu to the left of the PDF file, left-click on the + sign to the left of >
ThinkPad T40/T40P/T41/T41P/T42/T42P Series.

Now click on the + sign to the left of >
Removing and replacing a FRU. (Field Replacement Unit)

Scroll the file tree down, and click right on > 1130 Fan assembly

(The view is at an automatic 355 percent. I would suggest lowering it to a comfortable view for you.
Go to the top header, and click on the Zoom Out icon. ( - )
I reduced it to 125% )

The FRU removal list is shown in an order.

1) Battery
[ You should remove ALL power. This includes the AC adapter (Charger) also ]

2) I suggest you work on a table, Not on a bed, or directly on a carpet floor. These are High areas of Static electricity.
I also suggest you buy, and wear an ESD wrist strap. (Electro Static Discharge)
Connect the alligator clip to a Good ground source.
(I connect to the metal frame of an empty desktop computer case. +20 years, and no Anti-Static Mat needed)

Your body carries Static electricity.
Static will fry out (Short Circuit) the hardware components inside a computer. (It can also wipe off the data on a Harddrive)

An ESD wrist strap connected to a good ground source will prevent that.
An ESD wrist strap cost averages about $3 to $6.
Example of a typical ESD wrist strap,

(A $3 ESD wrist strap will work just fine. If you keep it around, be sure to use sandpaper to clean the corrosion off of the metal pad that contacts your wrist)

3) Suggest you use a multi-compartment container for the various screws you will remove.
Mark the compartments for the area the screws came out of.
There are screws that look VERY similar to other screws. They are NOT the same.
Do Not mix them up.
You can use a clean egg carton in a pinch. Mark each egg holder.

4) Make notes, and drawings. Perhaps use a video camera, or digital camera step by step as you disassemble.
Nothing like having a record to fall back to, in case you are disturbed in the middle of working on your computer.

5) After all power is removed, remove the,
A) Harddrive. Page 81.
(In the PDF file page number box. To the right of the blue down arrow in the top header)

B) Keyboard. Page 85

C) Palm Rest. Page 94

D) Keyboard Bezel. Page 97

E) Now the Fan Assembly

(NOTE* I would not use a metallic object when removing the Fan Assembly from the top of the Processor's case. Static carrier, and could be magnetic. Use a stiff wood tool.

Be SURE to Thoroughly clean the top of the Processor's case, and the bottom of the Heatsink. There is a proper method if you are not aware.
Also apply fresh, new Thermal Paste. Cost averages about $4 to $6.

Once the Fan Assembly, (Heatsink) is removed, the areas must be cleaned, and new Thermal paste MUST be applied properly)

For further questions regarding the above, please post in a Comment.

Posted on Nov 15, 2010

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The CPU fan is located under the keyboard. To remove the keyboard there are 4 screws on the bottom of the laptop. The screws holding the keyboard in place have a small keyboard symbol next to each of these screws. When you remove the screws you can then lift off the keyboard, take not to damage the ribbon cable and keyboard connector.
The heat-sink and fan is fixed to the CPU with 4 screws, after removing these screws you can remove the fan and heat-sink. It may take a bit of juggling to clear the case. Take care to unlug the fan power cable/connector.
When you replace the fan, don't forger to put new heat-sink compound on the CPU and fan.

Posted on Nov 15, 2010


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Posted on Jan 02, 2017

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SOURCE: cpu fan

Honestly, take the laptop to a pc repair shop. Any other laptop, except an IBM and I'd say do it yourself, but these 7000 series notebooks are another breed of animal. The worst part is that there are no repair manuals for them.

Posted on Jul 22, 2008

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