820-000165 wont turn on

[Kyle93]

Yes, checked traces with meter

 

[2informaticos]

Check for short between R7120 and L7130.
Be sure to have ALL traces good for CHGR_PHASE; to U7100, C7125, L/Q7130...

 

[Kyle93]

no short between R7120 and L7130

All traces good for CHGR_PHASE; to U7100, C7125, L/Q7130

PPBUS_G3H currently .510V

 

[2informaticos]

Post again voltages for U7100...

 

[Kyle93]

Came back to this board.

Replaced ISL6250 and Q7010 again. PPBUS_G3H fluctuates between 2-4V now

ISL measurements

Pin 2 18V

Pin 12 3.42V

Pin 13 1.30V

pin 14 0.882 V

pin 9 0.34V

pin 15 0.50V

pin 17 1.75V

pin 19 5V

pin 20 5V

pin 26 17.80V

pin 27 18V

 

[2informaticos]

"Pin 13 1.30V"
Are you sure?
It comes from SMC_RESET_L, which is not present in such case; unless R7100 is broken...

 

[Kyle93]

Pretty sure I killed the board by mistake. Replaced Q7130 since pin 1 was 0. Replacement Q7130 was not soldered properly and now there is a constant short to ground on F7140 as soon as Q7130 is soldered.

 

[2informaticos]

Remove F7140.
If short remains on L7130 side, then replace Q7130, U7100 and C7125.
Be sure to have good trace from pin1/Q7130 to pin 24/U7100.