Hello, i have bought a macbook pro unibody 2009 2,53Ghz, with a broken screen.

When i received it, i tested it and everything was OK.

I order a new screen and i dismount every thing form the upper case.

Now , the screen is repaired, but the trackpad doesn't work anymore (Except the click on the trackpad) which is weird.

And, as soon as i boot, the fan runs at 6000 rpm all the time.

I did the apple hardware test and it says:

Temp (TsOP) - Palm Rest Temp:

Temp (TsOP) - Palm Rest Temp (Test 1) - Sensor Reads Within Operating Range. - Check to ensure that sensor reads within operating range.

Error - sensor is reading above the high limit.

- T E S T F A I L E D -

Do i have to change the upper case ?

can somebody tell me where the sensor is located ?

Best Regards.

Sorry for my bad english, i'm from France...