Hi, I have a PS4 Pro with an issue where when I try to run any games it freezes, and then artifacts appear on the top half of the screen. After a few moments, it throws errors CE-34878-0 or CE-36329-3 without any artifacts and goes back to the dashboard as normal.
I started by checking the hard drive and it turned out to be fine, I also reinstalled the firmware but nothing changed.
Then I desoldered the NOR chip and modified system flags so I could access debugging info through UART. In the logs, this caught my eye:
# GPU Protection fault. vmid: system process3,pid: 0x28, client: TC4, access: Read
# reason: Unmapped page access, Protection fault addr(VA): 0x0000006742a5a000
# Raw fault info: 0x06197001 Timestamp:28504882590
but also sometimes you can catch a GPU protection fault with a different fault address
# GPU Protection fault. vmid: system process3,pid: 0x28, client: TC4, access: Read
# reason: Unmapped page access, Protection fault addr(VA): 0x00000010c8a4b000
# Raw fault info: 0x06097002 Timestamp:28834970633
This message appears when I try to load a game. What’s interesting is that an app like Playroom will work fine and also stuff like the web browser works perfectly. I played some YouTube videos through there too, but when I try to use the YouTube app itself it will fail the same way as games.
I also tried enabling the memory test system flag in the NOR chip, but it appears that it tests only some parts of the RAM, here’s the output anyway:
memtest: 0x000000000 - 0x040000000, size: 0x040000000, pattern: RANDOM
memtest: 0x000000000 - 0x040000000, size: 0x040000000, pattern: RANDOM(invert)
memtest: 0x25f000000 - 0x280000000, size: 0x021000000, pattern: RANDOM
memtest: 0x25f000000 - 0x280000000, size: 0x021000000, pattern: RANDOM(invert)
memtest: done. elapse=4075 msec
I suspect the RAM so I want to replace all of the 8 RAM chips, but I wanted to ask around if anyone had a similar issue before. Could well be the APU itself that’s faulty. Thanks!