Seller Note “This card just displays a black screen on turning pc on sold for parts only”
- Appears to be missing the VMem rail.
- VCore – 12.4
- VMem – 104.8
- PEX – 235
- 5V –
- 3.3V – 10.8K
- 12V – 11K+
Investigation into Key Components
I think this is a Richtek RT8809BZQW https://www.richtek.com/assets/product_file/RT8809A=RT8809B/DS8809AB-02.pdf
It appears to drive a pair of MOSFETS (TBC)
This also appears to drive a pair of MOSFETs (TBC). I need to check this in more detail since VMem is missing.
PIN 5 – VCC is 12v
PIN 7 – EN is 5v
Need to check further, but it seems the VMem rail may be getting shorted by some switching logic (TODO add pictures)