Macbook A1534 820-00045A No Power

[Korai]

Hi there


I got Macbook A1534 820-00045A no power, charger shows 20v 0.037amps

PPBUS_G3H present as normal
PPVIN_G3H_P3V3G3H present
voltages on PP3V3R3V0_AON are 3.3v which is normal I guess
PP5V_G3H_LDO is 4.98v which seems ok
then we have missing
PP5V_S0SW_LCD
PP5V_S4

any suggestions please .

regards

 

[2informaticos]

Can we get an exact voltage, instead of "present as normal"?

Do you get 3V3_S5?

 

[Korai]

hi

thank you for your reply


PPBUS_G3H = 8.58v

PPVIN_G3H_P3V3G3H on c7000 = 20v

3V3_S5 is full short to ground.

 

[2informaticos]

Inject voltage there; something should heat.
Start with 1V, no more than 4V.
Set amp limit to max on lab PSU.

 

[Korai]

Unfortunately CPU is getting hot nothing else does it means faulty CPU ??

Regards

 

[2informaticos]

Bad news, if CPU heats and nothing else...