820-00840 turn on after several minutes

BCN_Techs

Member
Hello everybody.

The macbook had liquid damage around U7000, it was changed for a donor but, there are problems in power on.

When I try to turn it on, it marks me as having no battery and after 15-20 minutes of letting it charge, it turns on with + 50% battery. The failure is random since there are times when it turns on the first time.

What do I check?

Thanks.
 

2informaticos

Administrator
Staff member
Does it turn on without battery connected?
Check PM_BATLOW_L level.
Be sure to use proper charger...
 
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