Hi there!
I've got myself an Xbox One X with a faulty power supply, and for better or worse, my goal is to repair the power supply rather than replace it. I have a fair bit of experience repairing PS4 power supplies, however I've never attempted an Xbox one and (unfortunately) I don't have any working units to cross-reference against.
Here's what I know:
- The unit is not outputting any power at its output (should be 12VDC)
- The main fuse is not blown
- There is clean continuity between the Live 240VAC input terminal and the components on the other side of the fuse
- I read 70VAC across the AC neutral and pin 2 of the high power rectifier (circled in blue in Image 2)
- The giant electrolytic bus capacitor is not receiving any power - it does not charge at all when the power supply is plugged in
As far as I know, the high power rectifier, and all the MOSFETs I can see are testing fine (ie. no dead shorts that would indicate a bad transistor).
Currently, I suspect the component circled in red in Image 1. As far as I can tell, the red and green circled components are meant to be the same (going off appearance), however the one circled in green reads as a dead short in both directions, whereas the one circled in red is an open circuit in both directions. The red line cut by the yellow in Image 2 shows where this component would pass power through if it was a dead short like the one circled in green.
If anyone has any ideas on what's troubling this power supply, or if you can identify the red/green circled components, I'd be super grateful. Maybe together we can work out this sticky mess of a power supply (seriously, why is there so much white putty Microsoft??).
Cheers!