Hi everyone,
I’m troubleshooting a PS5 Pro board that is stuck on an infinite BLOD.
1. Syscon Error Log
Error Code: 80C00140
Interpretation: APU Halt / No Response (Forced shutdown via power button).
2. Thermal Camera Scan
Upon powering on the board and scanning with a thermal imager, I noticed that the GDDR6 VRAM chip at Bank 1 is significantly colder than all the other VRAM chips, which warm up normally.
3. My Assessment & Questions
It seems the Bank 1 VRAM chip is either not receiving power, failed to initialize, or has broken BGA connections with the APU:
Is this more likely caused by a broken VDD (1.35V) / VPP (2.5V) power line/via local to Bank 1?
Or does a cold VRAM chip usually indicate broken CS (Chip Select) / CLK / Data BGA solder joints under VRAM Bank 1 or the APU?
Samsung K4ZAF325BC-SC20
What are the recommended next steps? Should I attempt a reflow/reball of VRAM Bank 1 first, or replace it with a new GDDR6 IC altogether?
Any insights or advice from would be greatly appreciated. Thanks!
