820-3115 PP5V_S5 drops

yobad

Member
no water damage
PP5V_S5 go to 5v, then drops to 0and get back to 5, it cycling
ppbus = 12.65
what to try next ?
 

2informaticos

Administrator
Staff member
Check if other big coils pulse too.
SMC_PM_G2_EN pulsing too?

Try to start in SMC bypass mode.
Check resistance between pins 17/18 and 27/28 of ISL6259.
 

yobad

Member
I checked Resistance between 17/18 it gave me 2.5 ohm, and between 27/28 20.5 ohm
and yes SMC_PM_G2_EN pulsing too
 

yobad

Member
It was totally shorted, resistance reading was 0 ohm, i enjected voltage and i found C6213 broken, i changed it and now working.
 
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