820-3787-A shuts down on battery power

Sr. Robot

Member
Hi, got an 820-3787-A that sometimes shuts down on 90% or 6% battery charge. It doesn't shut down instantly, it shuts down like battery is discharged. It doesn't do it on charger.

Tried 3 different batteries. OEM and Generic. Same issue.
Updated BIOS, no change.
Tried with another motherboard and it worked ok.

No signs of damage
 

2informaticos

Administrator
Staff member
You can try disabling GPU.
Changing the FDMF6808N chips is another option.

Any error pops up, starting in diagnostic mode?
 

2informaticos

Administrator
Staff member
820-3787 can be converted from discrete to UMA in the same manner as 820-3332 (2013).

Must force backlight adjust signal, to avoid wake from sleep issue:
- remove R7780 and inject 3V3_S0 to LCD_BKLT_PWM_R.
 

Sr. Robot

Member
I disabled the GPU and changed the FDMF6808N chips but same issue.

Diagnostics show nothing.

It doesnt shut down in safemode.
 
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