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In this guide I explain how to replace the cooling fan assembly in an IBM ThinkPad T43 laptop. This laptop was starting up with a “Fan error” message indicating the cooling fan failure. The fan is a part of the heat sink assembly and when the fan fails, the whole cooling assembly has to be replaced.
Also you can use this guide for removing and replacing the keyboard and hidden memory module.
Turn off the laptop, unplug the AC adapter and remove the battery.
STEP 1.
Remove three screws securing the keyboard on the bottom of the laptop.
The first memory module can be accessed through the door on the bottom.
It’ not necessary to remove the memory module in order to replace the cooling fan.
STEP 2.
Insert a sharp object between the bottom of the keyboard and palm rest and carefully lift up the keyboard.
Place the keyboard upside down on the palm rest.
STEP 3.
Disconnect the keyboard cable from the motherboard.
STEP 4.
Remove the keyboard.
If you are looking for a new keyboard for an IBM ThinkPad T43, you can find it here.
STEP 5.
The cooling fan assembly is hidden under the palm rest and cannot be removed until the palm rest is removed.
The second memory module is located under the keyboard.
STEP 6.
Now we are going to remove the palm rest.
Remove all marked screws from the bottom of the laptop.
STEP 7.
Disconnect the touchpad cable from the motherboard.
STEP 8.
Start separating the palm rest assembly from the laptop base.
STEP 9.
Remove the palm rest assembly.
STEP 10.
Remove three screws securing the cooling fan assembly.
Disconnect the cooling fan cable from the motherboard.
The cooling fan assembly part number is printed on the label.
STEP 11.
Lift up the right side of the cooling fan assembly.
STEP 12.
Remove the cooling fan assembly.
In order to find a new cooling fan assembly, I would suggest searching by the IBM FRU part number. In my case the part number is 26R7950.
You can buy a new cooling fan assembly here.
STEP 13.
Clean up the CPU and GPU chips with an alcohol swab.
Do not forget to apply fresh thermal grease on the CPU. You don’t have to apply thermal grease on the GPU because it will be covered with thermal pad located on the heat sink.
A new cooling fan assembly should come with thermal grease pre-applied on the heat sink. Also, it comes with thermal pad for the GPU.
September 19th, 2011 at 3:03 pm
The process was easy to follow. I also encountered the sticking problem on the ATI chip. I’ve reconnected everythinh. It boots, no fan noise, But… No display. Do you have any ideas?
September 2nd, 2011 at 10:08 am
This was a great guide. I followed it to the letter. My computer was a little different, but the basics were great. One question, while trying to replace the keyboard, I can not get the bottom right corner to seat. What am I doing wrong? Thanks again for the guide.
June 9th, 2011 at 2:32 pm
I just replaced the fan in a 15″ T43p (2668-H2U). I had the same problem with the fan being glued to the GPU. After some hard wiggling of the fan, I was finally able to break it free but it took the metal ATI plate off with it. I was able to separate the ATI plate from the fan with a chisel which deformed the plate a little. I removed the goop from the back of the ATI plate and the top of the graphic chips with alcohol and cleaned the adhesive from the top of the plate with a razor blade. Then, I made the ATI plate as flat as I could, applied artic silver to the bottom of the plate in the four corners and the center and placed it on top of the graphic chips. The rest of the fan reassembly went normally. After replacing wristpad, keyboard and screws, it powered up beautifully. The fan noise was gone. Now I just have to see if the graphics chipset will withstand the major surgery over the coming months/years. Hope this helps those with the the thermal pad glued to the ATI plate dilemma.
May 12th, 2011 at 12:42 pm
Anon,
Make sure memory modules seated correctly. Try reconnecting them.
Also, make sure you installed right screws into right holes.
Sounds like this is something simple. I would remove the cover again and check if everything looks normal and all cables routed correctly.
May 10th, 2011 at 5:20 am
i’m really glad i found this guide on how to replace the fan in a T43 i follwed all instructions since my T43 doesn’t have the fingerprint reader i had to removed an extra screw where the PCMCIA card slot is to remove the palm rest assembly in 2 parts and succesfully repaired the fan but now the laptop only responds when right front side is elevated and pressure applied to left front side it’s a bit impracticle to do this all the time might i have accidently damaged something
April 27th, 2011 at 4:07 pm
“the thermal pad is more or less glued to the GPU”
Same here (2668-G4G). There is some really hard material between the two parts, were you can see the arrow in step 11. I wanted to clean the laptop and replace the heat-pads etc., but couldn’t move the copper. This isn’t mentioned in the hardware maintenance manual.
October 31st, 2010 at 9:06 am
thijs,
Does your new fan have thermal pad for GPU? If it does, just remove the old thermal pad with a knife. After that clean the GPU surface with paper tower soaked in 99% alcohol.
October 31st, 2010 at 7:03 am
Hello,
Thanks for this useful guide to replace the fan.
I replacing the fan at the moment. But i’m having the problem that the thermal pad is more or less glued to the GPU. Do you have any suggestion to release the thermal pad from the GPU??
Kind regards,
Thijs
August 29th, 2010 at 11:24 am
Mistyck,
I don’t know. It is possible but you’ll have to buy a new AC adapter and try it. There is a chance that your DC jack/motherboard still fine. The laptop still runs on battery power and this is a good sign.
August 28th, 2010 at 1:07 pm
Hi there, got a question…
I think my Gateway NX570′s AC outlet part got fried when the adapter jack got wet and I inserted it into the laptop without realizing it was wet. I smelt a burnt plastic smell and the jack got hot as did the input on the laptop. Is it possible that I can fix this without having to fix the power jack? The laptop does work fine on battery, but right now I don’t have a way to recharge the battery so am not powering up the laptop.