Hello dear Badcappers,
I came across a PS5 that was longscrewed. The screw went through the HDMI IC (which I replaced + repaired the traces it damaged), however the screw also bend the board and slightly cracked it on the other side, which caused a short on following pads. It still seems like it could be fixable though as the area might not have lots of traces going through it (fingers crossed).
Can you, please, advice me on what the safe voltage is to test for a short for that “rail”? 0.9 V only gives me around 0.5 A, which is not showing anything on the thermal camera, as the board layers are great at moving that heat around. 
Thank you so much!
Upon further investigation I discovered that this whole trace is shorted to ground and has no voltage. Injecting 0.9 V doesn’t show any hotspots.
- When I am meassuring the voltages I can find 0 V on the F7501 area.
- There’s no voltage on VCore or Vram (not even a hint of any activity on those rails)
- UART shows codes 80810001 and C0810002, which correspond to:
HDMI IC Problem or Power Failure
General Power Failure (Peripheral, GDDR6, APU, Data Line Short)
Can anybody more experienced than me please point me to a correct direction? I have multimeter, scope, powersupply and blind courage. Is the APU dead or is the general power failure caused by the short on that (possibly) minor rail and not working HDMI IC?
Thank you!
It turns out the short was on the other side of the board (possibly a solder blob under the HDMI IC). Now this trace has a healthier resistance of 200 ohms to ground.
However, in the proces I managed to knock one of the resistors and a diode marked on the picture. Does anyone please know what are their values? I faintly remember the resistor being 5k, but would like to doublecheck before replacing it.
Thank you!
For future reference, that resistor is 4.3k. And that 300-400 ohm resistance on that trace is also normal.
I managed to troubleshoot a bit further though - it turns out this transistor:
is missing the 3.3 V enable signal for the 5V (even though it’s getting 5V on the input). I was trying to trace where the 3.3V trace goes to, but no luck. Might be going straight to the chipset (however it has around 1.6 MOhm resistance to ground, so the trace is not severed). Does anybody know what can cause PS5 to not enable this specific 5V rail?
