820-00165 No USB activity

No-Clean

Member
Clean perfect board, VCORE 1.8V steady, SMC bypass same thing

Already tried:
Clean known good BIOS
Different SMC
Removed Q8150
Replaced U1950
Heated up PCH with good flux

PP3V3_SUS 3.3V
PLT_RESET_L present 3.3V
PLT_RST_BUF_L 3.3V
ALL_SYS_PWRGD 3.3V
PM_S0_PGOOD 3.4V
 

2informaticos

Administrator
Staff member
Possibly bad CPU.

Check all SPI Bus Series Termination resistors and traces.
Did you remove airport card and SSD?
Test the board alone, no LIO flex, nor trackpad.

Check all resistors from LPC bus.
Is there any activity on the o-scope?
 
Last edited:

No-Clean

Member
All my test are done with bare board and known good LIO flex and board.
Tried no LIO flex, same thing.
Looks like CPU is muerto!
 
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