Today I repaired a PS4 with the Blue Light of Death(BLOD) which had a faulty RAM module(2-3)

The UART logging shows that the console stalled at activating the RAM block 2-3. I went ahead and replaced the faulty block.

Once installing the replacement RAM the console booted fine. I also was able to confirm which block was faulty with the thermal camera and could clearly see the 2-3 block was not starting up as it was not getting hot like the other blocks.

The console now boots instead of sitting with an infinite pulsing blue light