820-01987 liquid damage

Kyle93

Active member
This arrived liquid damage. After replacing everything affected by the liquid machine was turning on and booting into OS. Customer wanted drive erased and updated to big sur. During the reinstall process machine kept crashing about 1/2 way claiming there was a problem with your computer and showed the symbol with a X through it.

Assumed it was a firmware issue so did a DFU restore. After the restore when the O.S was almost finished installing (Went alot further in the install vs before the restore) the board just died and wouldn't boot back up. Now when trying a DFU restore again getting the error message "The system cannot be restored on this device" Device added from invalid state Restoring 0XFAA(4010)

A couple times when trying the restore the fan would start spinning at maximum speed until unplugged.

All of the AWAKE and SLPS2R voltages appear to be present. What should be checked next???


PP1V2_AWAKE 1.2V

PP1V8_AWAKE 1.8V

PP3V3_AWAKE 3.3v

PPVDDCPU_AWAKE 0.755v

PPVDDCPUSRAM_AWAKE 0.802v

PP0V8_SLPS2R 0.800v

PP1V8_SLPS2R 1.8v

PP1V25_SLPS2R_SMC_AVREF 1.250v

PP1V1_SLPS2R 1.1v
 

2informaticos

Administrator
Staff member
Possibly problems caused by accumulated crap under some BGA chips.
May have corroded traces, or components also.
 
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