[solved]820-3462 No green Light

[kronos23]

Board has no green light. SMC_ACOK is present on U6900 and U6901 while SMC_Reset_L is low 0.4v at U5010. Any ideas ?

 

[Repairable]

Check First

Pp3v42_g3h
ADAPTER_SENSE
smc_bc_acok

Then have you got around 4v on acin ? (U7000)

 

[dukefawks]

You already gave the answer, SMC_RESET is low it should be high.

 

[larossmann]

_L means signal is present when low.

SMC RESET being 0.4v means SMC RESET is present.

hold down the reset button to a traditional old desktop computer. does it work?

the SMC won't work until the reset signal is no longer present. since _L means it is present when it is low, it has to be high.

so what chip is responsible for SMC_RESET_L?

 

[kronos23]

Solved. Board repaired, replaced U5110 from donor board. Thanks guys