Chosen Solution

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…

Disconnect and then reconnect the cables from the uppercase to the logic board. Make sure they are squarely in their sockets and all the way in. Then reset the PRAM and SMC. Click here and click here for instructions on the resets. Also look to see if there is any swelling on the battery.

This is insanity. TS0P is sensor inside trackpad cable; the cable going between the trackpad and the motherboard. Why are you people replacing the entire case over one stupid cable? Further, TS0P shares I2C_ALS_SDA & I2C_ALS_SCL data line with other sensors, so it is possible that the webcam is pulling the TS0P sensor line down. Unplug webcam/wifi/bluetooth cable and see if you still have same failure.

Worth noting… (and Louis was right) My solution: Unplugged the touchpad, restarted, still had fan+kernel_task throttled. So started to suspect the sensor error was a red herring. Proceeded to unplug and restart each mainboard connection in turn. I did every one including the display… then I finally did the iSight connector (the silverish one next to the speaker/sub connector). PROBLEM WENT AWAY! (and hardware diagnostics report no problems). I should have suspected this sooner as there was a busted cable (due to busted display hinge), but didn’t know which one it was. My brother’s machine can now limp along happily for another several months with it’s gaff tape hinge. ;-) So just be aware that hardware diagnostics may LIE lie to you about that palm rest sensor (or at least fib a little, ignoring the root problem).

i just checked every thing, i dismount everything again. I see that the cables from the trackpad is cut about 3 mm. I think i found the problem. I’m going to buy an upper case with trackpad on eBay…

iSight Disconnect Worked! I disconnected the trackpad, cleaned it, checked cables and fit. Did PRAM and SMC as well. No change after Apple Hardware Test runs. Error message 4SNS/1/40000000: TSoP-128.000 After reading this post, I disconnected the iSight cable, and booted up my Macbook Pro 17" (Mid 2009; 5,2). First thing I noticed: No fans! Ran the AHT and found 0 errors! I did notice both WiFi and Bluetooth were not present in El Capitan (10.11.6), although still physically connected. Reconnected the iSight cable. Fans kicked in on power up. So did the error after an AHT run. I’m going to try replacing the cables. Will report on it! Some links that were helpful to me…