Palit Geforce GTX 1080TI - not detecting PEX Power

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Hi,

i've got a Palit GTX1080TI Blower with which someone previously tampered and tried to repair it.
Fortunately, it enables the screen, so gpu and stuff seems intact. Powerrails also ok. Only problem is: Despite of having connected both power connectors, it complains that PEX-Power is missing (on screen message, like cables are physically missing) and refuses to boot.

I already asked for boardviews in another thread, which should allow me to better check everything.

But despite of that, any ideas where to start looking?

Kind regards
Stephan

[Grucha98]

Re: Palit Geforce GTX 1080TI - not detecting PEX Power

Start with fuses of course, check photo of pcb maybe something is missing

[Fump]

Re: Palit Geforce GTX 1080TI - not detecting PEX Power

Start with fuses of course, check photo of pcb maybe something is missing

- Fuses are all good
- rails and voltages are ok
- no pieces missing

I have a spare pcb (defect, missing components and gpu) to take parts from and compare.

I suspect something in the INPUT_PEX8_DT <----> GPIO path to be fishy.

What reasons are possible for causing the corresponding bios-message?
I thought without working NVVDD the card would not turn the screen on and the board is load balancing between PEX1,2 and PCiE?

I'm relatively new to graphics cards, so i can only access my general knowledge of electronics and computers, which should be plenty, but in this case not enough.