820-01598-01 fan full speed

os working yes,
i have see oxydation on slot, clean and working perfect
but i have another problem, battery not detect. I have put another and same
PPVBAT_G3H_CONN have 12V during 6sec and go to 0.6V. and 12V again 6 sec
Think problem with flex info batt but same problem
 
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