820-00239 reboot intermittent when battery under 60%

raainxx

Member
Hi,
this board receive liquid, not work. the USB C connector JB5000 is burn, i remove it and the board start and work well on the other USBC port. but if i unplug the board, the mac work well above 60% of battery.
when the battery is low, I have PPBUS_G3H at 11V, is it normal? with power supply 13,05V.
 

2informaticos

Administrator
Staff member
If only battery connected, you cannot exepect to get 13V.
You will get the voltage according with battery level.
Even if battery and charger are connected at same time, PPBUS_G3H is lower and increases charging the battery.
When battery is fully charged, you will get 13V steady voltage.
 

raainxx

Member
ok i understand but what can i check to look why the board make kernel panic when the level battery come under 60%.
 

2informaticos

Administrator
Staff member
Try known good working battery first.
I saw so many weird problems generated by batteries, as you cannot imagine...
I don't refer to this model, but in general.
 

raainxx

Member
i test with an another original battery of another macbook pro same year.
I have a kernel panic when i run heaven on battery (the level of battery is not important) i have the problem at 75%.
When i run heaven in power supply no problem. when the problem come, the screen become black and i have the text of kernel panic after 10 seconds.
Do you have any idea?
 

2informaticos

Administrator
Staff member
Graphics benchmark requires lot of power.
Battery should be capable to support that, but in time may fail probably.
You can run same test in similar machine, for comparison.

Machine works good, apart of benchmark fail?
No problems on battery in normal mode?
I don't think someone will play hard games on battery only...
 

raainxx

Member
no the mac don't work well on battery, make kernel panic when you use it on battery.
I use heaven to stress more quickly the mac for make the problem.
heaven work well on other mac on battery.
 

2informaticos

Administrator
Staff member
Install HWMonitor and check for strange current, or temp value.
Check the traces and components related with BMON signal.
 
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