A1286 820-2915-b green light, fans try to spin.

Macbook pro a1286 820-2915-b
history
this is my personal macbook. I dont use it for gaming or graphic rendering.

I have reflowed the GPU twice as it has died. I'm aware reflowing is not a permanent fix. It's a bad bandaid.

anyway.. I reflowed it today, and now it won't boot.

problem..
when I plug in the mag, it's the genuine 85w mag, the light remains green.
and upon plugging the mag in the fans try and spins, like jerking every 1 to 2 seconds.

I have checked rails

ppbus_g3h is good
pp3v4_g3h is good
pp5v_s0 is not there
pp1v05_s0 is not there and its shorted.
on pp3v3_s5 I'm getting 2.707v unstable, moving from 2.703 to 2.762 correct me if I'm wrong. But should that be 0v when the mac ain't on ?
 

2informaticos

Administrator
Staff member
PP3V3_S5 should appear when charger is connected.
No need to press power button, as the machine should start by itself.

"pp1v05_s0 is not there and its shorted."
Exact value?
There is low value as normal...

I suppose you damaged the GPU, or CPU with too much heat.
Resistance to ground on GPU power rail?
 
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