A1708 820-00840 do not turn on.

[buritix]

Hi everyone , I need help with this equipment, Macbook pro 820-00840 don't turn on.

voltage on both ucb-C ports = 5.21 V. 0.10 A


PP3V3_G3H = 3.4

PPBUS_G3H = 0.0014

PPDCIN_G3H_CHGR. = 5.195

PPVIN_G3H_P3V3G3H = 4.8


Thanks

 

[2informaticos]

Post diode mode to ground at PPBUS_G3H.

 

[buritix]

PPBUS_G3H = 433 OHM

 

[2informaticos]

I said diode mode, not ohm scale!
Red probe connected to ground.

 

[buritix]

 

[2informaticos]

I clearly see ohm scale there.
Select diode mode; push yellow button....

 

[buritix]

Sorry, my bad you are right , thanks for explain me.

PPBUS_G3H = 0.437

 

[2informaticos]

"PPBUS_G3H = 0.0014"
So this was voltage?

Any history fault?

Post diode mode to ground on the 4 LDO rails of CD3215 chips.