Hi,
this time I have a defective PS5 with long pulsing blue light.
No white light.
No output via HDMI.
No Safe Mode. (Turns off if press and hold “On/Start” after approx. 45 sec)
No shorts or missing voltages (standby/power on) and all fuses ok, so far I checked.
Southbridge gives out over EMC UART “OK 00000000: 3A $$ [MANU] UART CMD READY: 36”, like I would expect from a working southbridge.
No spilled liquid metall.
Under a thermal cam everything lights up like it should (Southbridge, SSD Controller, RAMs, APU, powerstage Mosfets, DC-DC converters)
I tried some washers under the screws at the APU clamp but no changes.
The story, I was told: The PS5 was tested working at the sellers house and after arriving at home the buyer couldn’t get the PS5 started anymore.
Any ideas are welcome. 
