Don Says:
“Fan Error” means the fan is not spinning up. Sometimes the problem can be a sticky fan or sticky grease in the fan, and rarely you’ll get lucky and the fan will un-stick and start working again.
More likely, however, is that the fan is burned out and is not working any more. You need a new fan. It’s a 60-minute repair job, using the thinkpad manual from the IBM website.
The motherboard has a sensor that detects how much power the fan is drawing. If you blow on the fan at startup, you might fool the sensor but when you stop blowing, the fan will stop turning and your CPU will overheat.
It’s extremely cheap to put a thermistor on a CPU made in VLSI, and I’m virtually certain that the Pentiums on Thinkpad laptops have a CPU overheating sensor, and that’s why your laptop might shut down a short time later after it has booted up. Your fan is not working and so the CPU shuts down.
When you replace the fan, you need to add thermal paste so there is good conductivity between the fan and the CPU. The fan is not just a fan, but also a liquid-cooled set of pipes from the CPU to the fins that the fan cools. If the heat doesn’t get to the liquid pipes (via thermal paste), no amount of fan blowing will help !! You can get 2 syringes of thermal paste from Hong Kong for about $2.00 on ebay (shipped) if you shop around. Or you can use zinc oxide (sunblock), white silicone grease, or even toothpaste – all 3 are nearly as effective as each other.
http://www.dansdata.com/goop.htm
So, if you replaced your fan and the CPU starts up and shuts a short time later, chances are good that you didn’t properly connect the fan to the CPU (or the graphics engine) via thermal paste. you will need to disassemble, reapply thermal paste, and reassemble the laptop.
======
My problem is that I replaced my T42 fan, and now 3 months later the brand-new fan is not working again. I am desperately hoping I got a bad fan, because the alternative (something inside the laptop is killing the fan) will murder my laptop. Anyone have any ideas ??
Source:
http://www.insidemylaptop.com/ibm-thinkpad-laptop-displays-fan-error-message-on-bootup/
.
No comments:
Post a Comment