820-00850 power on problem

[2informaticos]

Use PMU_ONOFF_L instead...

 

[Kyle93]

no reaction or changes when trying SMC_BYPASS mode

 

[2informaticos]

Did it come with Catalina?
Try an upgrade to Big Sur.

 

[Kyle93]

yes and already upgraded it to Big Sur. No changes

 

[2informaticos]

PCH_PWRBTN_L drops when you trigger PMU_ONOFF_L?
If yes, then should be PCH issue.

Just in case, be sure all LID signals are good.

 

[Kyle93]

yes, PCH_PWRBTN_L drops when triggering PMU_ONOFF_L

PCH is tied to the CPU on this board correct? Anything else worth trying or unfixable?

 

[2informaticos]

PCH is embedded in the same package with CPU...