820-3332 No Power, Boiling Q8930

[brunomotter]

The only step I did not do was removing the power coils for GPU, so I did, put a fresh BIOS, still same result. Board is with the 3 jumpers for GPU disabling, both GPU coils removed, new BIOS. Same status. LCD BKLT powers on, no image, no chime, just fans spinning at max. Cannot reset PRAM, machine does not respond to any commands, no VCORE present on L7560, L7550, L7510, L7520 and L7530, all of them have 0.05mV on them.

 

[brunomotter]

So, dead GPU then?

 

[2informaticos]

Something happened when you worked on GPU power supply.
GPU got overvoltage few times, when Q8930 was shorted.

 

[brunomotter]

So, what if I remove U8000? Board should at least chime?

 

[2informaticos]

As you have already disabled discrete graphics, GPU can be removed now.

 

[brunomotter]

Ok, will remove it on BGA machine and post back ASAP to tell what happened. Thanks for now.

 

[brunomotter]

Removed GPU and….. Still same! No VCORE on this shit… don’t know what to do anymore

 

[2informaticos]

Lift one side each GPU related coil.

 

[brunomotter]

Those would be L8360, L8310, L8930(already removed) and L8960(also removed). Any other coils? Will do it tomorrow as soon as I get at my store.

 

[2informaticos]

Yes, these are...