Apple! Where's your spine?

I was told to take my laptop to a service.
Apple now suspects that the motherboard might be faulty. I gave them the error code I received some time a go when i ran the hardware test. "4SNS/1/40000000: TNOP-76.375"
The "TNOP" part here means that it has something to do with the temperature sensor.

Too bad that it has nothing to do with the ineffective cooling. Seems more like a excuse rather than a solution.

1. If it would be faulty temperature sensor why the computer would shut down due to overheating even the fans spinning full speed? (ok... this one is possible with wild imagination)
   
2. Why would the computer run constantly at lower clock speed if it would not be too hot?
3. Why would my computers broken temperature sensor affect EVERY UNIBODY LAPTOP IN THE WORLD!?

I understand if this would be an single case and only my computer acting this weird. Then it would make sense that faulty temperature sensor would make the fans spin 2000 rpm even at full load. But this is not a single case! This is a fault that every Apple laptop released since late 2008 is affected. I just tested my fiancees 13" MBP and hardware test did not show anything wrong and yet her computer acts exactly the same. When under excessive load fan (only one fan in 13" model) does not speed up not until it is too late.

Pay attention to number 3. Maybe somewhere next Wednesday magically every Apple laptop might start working when they fix my possibly faulty temperature sensor.

4SNS/1/40000000: TNOP-76.375

I tried Apple Hardware Test to see what kind of test program it is. I was told by the service point that it is the only program to determine hardware faults undoubtedly. No other ways are supported by Apple

First thing I noticed was that the fans run ~3000 rpm at minimum during the testing. So it is impossible to notice any fan speed related issues with Apple Hardware Test.

Second thing that I noticed was the error code "4SNS/1/40000000: TNOP-76.375"
I have no idea what it means and by Googling it or parts of it does not give any more info.

I tried running the hardware test again and it passed successfully. Well who would have guessed that the program itself is a bit sloppy. And we're talking about the program which Apple uses to determine if computer is fully functional.

I'll call tomorrow the service point if they have more info what this error code could mean.

Just a dust - why so serious?

I got call from service point telling me that I could now pick up my computer. They've cleaned the interior from dust. Normally this type of service would cost me but they forgot to tell me this so this one is free of charge.

Why was I not convinced that this is the solution? Even though they said that they tested and saw no more than 70°C on CPU temperature.

I brought the computer home and fired up two "yes > /dev/null" and soon saw temperatures above 100°C. Why did not they test my computer properly? Was they on a hurry?

I soon visited service point again... this time without any hopes of facing expertise at the other side of the service counter.

Week... or two later I return to pick up my computer. New motherboard (Logic board) installed and this time they tested it 24 hours with Apple hardware test and it did not overheat.

I was not surprised to see that nothing have changed... Still every game is unplayable because of massive FPS drops due to CPU's temperature throttling. I have a nice 2,8GHz CPU which is usable only on light usage. When I try to push it to the limits it just regresses back to 2005 when I last had this slow CPU.