820-00923 - Slow and fans loud

[Palhano]

board is ok. Tried changing trackpad and cable, also disconnected webcam.

I ran HWMONITOR and the System Proximity sensor marks 128º.
Apple test found problems with SMC (PFM006) and power supply (PPN001)

Some help?

 

[2informaticos]

These errors are usually related with trackpad.
Trackpad/keyboard work correctly?

Chinese trackpad flex can give problems, test more.
Test with known good battery also.

 

[Palhano]

Yes, keyboard and trackpad working normally.

I'll get another machine to test. I give news.

 

[Palhano]

I put the board in topcase of another mac, same problem.

 

[2informaticos]

The other MacBook works correctly in that chassis?
These errors can be caused by bad battery too.

ALS works correctly?

 

[Palhano]

Yes, another chassis works perfect.

I tested the ALS, the automatic brightness works normally.

The problem continues even with the battery disconnected.

 

[Palhano]

correction, board is 820-00923.

 

[2informaticos]

All temperature sensors placed on MLB can be found on page 56.
Your problem should be caused by another interface, connected to the bus of one of the interfaces from that page.
May have knocked off components, or broken traces, which impede communication with trackpad; on the I2C bus corresponding to its thermal interface.

 

[Palhano]

looking everything under the microscope. I found that the U5860 is missing, it was ripped out with everything, pads and track. The customer reported that the Mac had never been opened. I will try to correct.

Thanks a lot for the help.