820-02020 M1

[iremont]

Where to start, comp working tryed different housing, trackpad and battery, still same, there may be issue with fan. And fan after turn on full speed

 

[2informaticos]

Tried known good battery?
Test with external monitor, disconnecting internal LCD.

 

[iremont]

Tryed another display m1 and tryed different batteries

 

[2informaticos]

Run HWMonitor and check for strange values.
Check all components around UE501, QE500 and JE501.
Compare diode mode readings with good board.

Any history available?
Just in case, try DFU and full reinstall.

 

[iremont]

Everything is clean around ue501, qe500, je501. was water spill. around the backlight area and speaker amplifer area.

 

[2informaticos]

Do all previous mentioned tests.

Tried with external monitor disconnecting internal LCD?
Also test disconnecting JR900.

 

[iremont]

tryed disconnecting internal, same thing, and jr900 same thing, when boots it starts fan max

 

[2informaticos]

Did you check the temps with HWMonitor?

Test the board in other shell; fan itself may be affected by corrosion.

 

[iremont]

tested another shell and board, everything works, this mobo got problems.

 

[2informaticos]

"Check all components around UE501, QE500 and JE501.
Compare diode mode readings with good board."