Chosen Solution
Hi! So here I am with second xbox one s. The frist one I find unfixable but now I got another one. What’s wrong with this one. It has zero reaction. No white light, no beeb, no fan moving, zero completly. But in the test points I have proper voltage(3.3v , 1.8v, 12v etc.). Maybe I checked mosfets wrong. I will check them again after work. But what can couse it? Im afraid it can be southbridge but there are voltages so maybe APU? Or just voltage converter ncp405? Looking forward for answers and wish you great day!
Good afternoon from the land down-under, Have you tried a new power button board. This is always one of the first steps you should take as i don’t believe there is a way to manually short and turn the thing on. If so then have you checked your connections. If so again and most of your components are good, sounds like either a southbridge or APU problem meaning some Solder balls have cracked and given way. You can reflow and tighten these with washers if needs be but this is temporary. The washer thing is generally only done with PS4’s (I have one that hasn’t BLOD yet)
