820 2330 - Green Light - Don't turn ON!

[Noguinfor]

Hey guys,

This board have a short to ground in PP5V_S3! I put some voltage in this line, the U6610 heat replaced for new on, but short don't goes on and i replace q7225 and short gone it's ok.. But when i plug the charge the short comes again!! any help??

Thank you

 

[dukefawks]

Voltage on C7771?

 

[Noguinfor]

1.1V .. capacitor already replaced...

 

[dukefawks]

Q7225 blew up probably because U7201 died. There was a voltage spike on 5V_S3 and this could have killed many other things. Compare resistance to GND on 5V_S3 to a good board and replace U7201.
You are using a REAL 85W charger and shorting the power pads to turn it on? 3V3_S5 present?

 

[Noguinfor]

ya i'm using a original charger 85W and shorting the power pads to turn on!

already replace a U7201 for a new one. And PP5V_S3 = 36ohm compare for a good one Floats between 5k - 6k ohms.

3V3_S5 = 3.36V

 

[dukefawks]

So there is a semi short on 5V_S3, could be anything on this rail and 36 Ohm is probably not enough to heat anything up. Rabbit hole antique board.....