820-01521 no boot 5v 70ma data recovery needed.

[donnos]

820-01521 is stuck on boot, no shorts anyway, stuck on 5v 70ma. no heat signature anywhere including T2 except for the cd3215 that its connected to.
PPBUS_G3H 12.2V
LDO on the PMU for SLP/awake all present. including 3v3.
injected 1.8v to force_DFU but does not seem to work. out of ideas now

 

[2informaticos]

Solder a switch to force it into DFU.
Press it at same time with power button, until machine goes off.
Maintain it pressed 2-3 seconds more, after power button is released.

 

[donnos]

unfortunately did not help,
i tried soldering R8010(SOC_Force_DFU) to C7845(PP1v8_SLPS@2R) and i'm still getting only 70ma current draw and no dfu

 

[2informaticos]

Then should be bad T2 chip...

 

[donnos]

so instead of 1.8v from PP1v8_SLPS2R i injected up to 2.2V and this actually got it into DFU. Revive it and its working now.

 

[2informaticos]

Thanks for feedback,
This was really weird.
Another forum member can need this info.