Microsoft Surface 2 1769 screen flickers on and off 4-5 times and powers off

[ub6ib969]

Hi,

I managed to open the unit and found shorts on lines VCORE, VCCSA_SENSE, VCCSA. Does this mean that the CPU is most likely toast or U6601 VCPU controller ?

[Clarify4082]

Hi,

I´ve the same model on my desk. It also flickers on and off 4 times.

Readings on my board:
VCCSA: 44.3 Ohm
VCCSA_SENSE: 38.5 OHM
VCORE: 9.1 OHM

I´ve managed to get a windows-Logo on the screen for the time it flickers.
On my board U58002 is missing (Integrated Load Switch) When I bridge VIN and VOUT I get the windows logo.

I also injected 3V into VOUT on U58002 and the nuvoton TPM Chip and the VCPU-Controller (U6601) are getting warm. The board takes 0.073A...

I´ve also reflashed the bios, from here: https://www.badcaps.net/forum/troubl...del-1769/page4
The problem seems to be very common with this model, but a fresh bios is not the fix...

[ub6ib969]

seems I need to inject voltage, would I inject low voltage to one of the shorted lines ? VCORE ?