820-3536-a not turning on, magsafe orange light

2informaticos

Administrator
Staff member
Original Magsafe 2 60/85W charger?

Try SMC bypass mode first.
Check U1900 area for corrosion.
Do you get steady 32KHz at pin 12?
 

Yoel Ren

Member
yeah magsafe 2 85w
ok i will try smc bypass : not working
u1900 no corrosion, magsafe unplugged, but pin 12 not steady, cycling
 
Last edited:

2informaticos

Administrator
Staff member
Cycling DC level,or 32KHz oscillation is not constant?

"magsafe unplugged"
Why???
You need to make the board works on charger first.
Let the battery unplugged.
 
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