820-00165 no display 0.25A

ronaldo

Member
Hi everyone.

CPU VCore present. Fan spins on then off then on and stays on full speed.
No USB activity light turns on but not blinking.

PPVCC_S0_CPU - 1.69V steady

Very minor liquid on U1930 pin 6. U1930 replaced.
The rest of the board is clean.
Mac started to boot to the system and works fine, after a few hours it started to not turn on. Just turning on after SMC reset on the keyboard.
Now I get green and orange light, fan spins goes off spins again and goes full speed.
SLP and ALL_SYS_PWRGD is present
PLT_RESET_L missing

Can you help me, please?
 
Last edited:

2informaticos

Administrator
Staff member
Check CPU_VCCST_PWRGD and CPU_VR_READY.

I suspect accumulated crap underneath CPU; heat with quality flux.
 
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