820-2993 short to the ground

[dukefawks]

Was the short on the main bus? If you put more than 3V on the bus of the CPU it is probably dead already.

 

[Dmitry]

Was the short on the main bus? If you put more than 3V on the bus of the CPU it is probably dead already.

Yes main bus was short to ground. Connector that get power from power supply was short to the ground. Since I didnt find any broken capacitors I supply 12v to the connector were power supply goes... Did I do it wrong? I am trying to apply my cellphone repair experince to the macbook repairs. How should I have started if main bus is in short?

 

[dukefawks]

So you applied 12V to the main power bus and the CPU heated up? This indicates a shorted "high side" FET in the CPU power supply and probably will have killed the CPU already.

 

[Dmitry]

So you applied 12V to the main power bus and the CPU heated up? This indicates a shorted "high side" FET in the CPU power supply and probably will have killed the CPU already.

That is correct, Thanks for details.