IBM ThinkPad R40 2681 "fan errore thermal sensing error" Questions

Thermal Sensing error I keep getting this message "thermal sensing error" every time I switch on my thinkpad what does this mean? "Thermal sensor error" just means "Broken fan".

...Thermal error on the T43 usually indicates a problem with overheating. This can be caused by many reasons: 1. Dirt build up on fan or fan louvres causing fan to turn slowly and not being able to cool ...

...thermal overload) and won't boot up again until it has cooled down. If this is the problem is not fixed then the CPU will eventually fail. A faulty fan causes the problem or the fan and heat sink ...

...thermal overload) and won't boot up again until it has cooled down.If this is the problem is not fixed then the CPU will eventually fail. A faulty fan causes this problem or the fan and heat sink ...

...fan. Thermal fan assembly removal and installation ThinkPad Edge E531 Lenovo... Also the service manual which says the solution is to " Replace the system board." ...

...thermal protection sensor that senses extreme temp. i suggest return to your service provider and have them check again, it could probably cause by, the fan isnt plug or there is a lot ob obstruction ...

...thermal paste and re assemble the video card with the cooling staff. (mek sure no screw is loose or something) 4. put it back and turn on the computer. If it works , whell .. it works now :) if not ...