820-3209 ppbus_g3h low

Gmorb

Member
got this random board had a couple knocked off components replaced n retraced i get no green light and ppbus_g3h is around 1v, 3v42_g3h is present.
replaced isl but nothing changed. no green light on charger.

i dont have much hope for this thing i can tell someone may have tried reflowing it before me the black plastic on cpu is warped just wondering if i may be missing something.

if i can get ppbus_g3h to be present at least also PPBUS_S5_HS_COMPUTING_ISNS is the same as ppbus_g3h 1v
 

JohnB8812

New member
Resistance to ground on PPBUS_G3H? If it's low, it's probably shorted because of the fucking moron who reflowed the CPU.
 

2informaticos

Administrator
Staff member
Measure resistance to ground on PPBUS_G3H.
Also measure on all big coils. If you find same value on any, check for short to PPBUS_G3H.
If no short/low value, then post some voltages at ISL6259.
Start checking resistance between pins 17/18 and 27/28.
 
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