820-00850 5V 0.4A

yair37 · Tuesday at 3:22 PM

suddenly dead.
5v 0.4a on charger
ppbus pulsing 12v-10v every 1-2sec.
not enter to DFU.
didnt see any short on board.

2informaticos · Tuesday at 4:53 PM

Remove F7000 and check if C7050 voltage is stable.

yair37 · Tuesday at 6:10 PM

yes its 12v stable

2informaticos · Tuesday at 7:05 PM

I bet for 12.3V, isn't?

Resolder F7000 and check 3V3_G3H_RTC now.

yair37 · 2024-11-20T09:35:45+0000

3V3_G3H_RTC 3.4v stable

2informaticos · 2024-11-20T09:37:49+0000

Do you get expected SLPS2R and AWAKE voltages?
Also check G3S voltages.

yair37 · 2024-11-20T09:43:00+0000

All SLPS2R and AWAKE voltage pulsing from 0.5v to 0v
dont get voltage on G3S lines..

2informaticos · 2024-11-20T10:58:27+0000

Check U7800 LDOs (page 75).