820-2915-b I know it pile of sh##t but PPVCORE_S0 is shorted

[Ciki]

I couldnt find any water damage ,green light then red on charger ,macbook sometimes start and fan spins ,sometimes just quater spin,anyway ppbus_g3h is 12.54V ,PPVIN_S5_HS_COMPUTING_ISNS is 12.54V,
PP3V42_G3H is 3.4V, and I found that PPVCORE_S0 is 0V and diode resistance is 00.1 ,PPVCORE_GPU is 1.1V ,try to remove Q7510,and Q7515 and is still short

 

[dukefawks]

What is resistance to GND on CPU Vcore?

 

[Ciki]

Now I replace Maxim chip and remove R7550,R7510,R7520,R7530 and found that only line is shorted PPVCORE_S0_AXG

 

[dukefawks]

Again, define "shorted" with an Ohm reading....

 

[Ciki]

Reading on L7530 ppvcore_so is 6.0 Ohm resistance to ground

 

[dukefawks]

That is not shorted and normal. Does this board still have the serial number sticker on the RAM slot?

 

[Ciki]

I think is shorted when im diode measuring so red tip on ground and black on ppvcore show 0.001 resistance ,and removing R7550,R7510,R7520,R7530 showing 0.544 and only the PPVCORE_S0_AXG stay shorted i mean 0.001

 

[dukefawks]

6 Ohm to GND is nothing special. Compare with working board. You measure a voltage drop in diode mode, not a resistance.