820-00840 no power

Mac Tech

Member
This team tells me the client that it was turned off out of nowhere.

PPBUS_G3H 13.05V

CPU voltages, PPVCCCPU_S0G is 0.95 then drops to 0.66v.

There is no startup sound.

PM_PCH_PWROK and PM_PCH_SYS_PWROK present with 2.96V

AP_RESET_L 3.0V
PLT_RST_L 3.31V

RAM voltages present.

I don't know what else to do, CPU dead?
 

Mac Tech

Member
yes i did that I disconnected the flex from the LCD so that I can take an image through the USB c to HDMI adapter and nothing...
 

Mac Tech

Member
no, the keyboard light does not turn on, and the top case works because it is from a computer that is 100% operational.

There is no light on the keyboard but there is click on the trackpad it is very strange
 

2informaticos

Administrator
Staff member
TP click is not a life sign.
If Caps Lock doesn't react, I bet no USB activity present; be sure to check properly.
I was talking about USB activity, not USB power.
USB mouse with light on, doesn't confirm activity.

Did you try known good BIOS?
 

2informaticos

Administrator
Staff member
 
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