PS5 is working normaly and then shuts down EDM-010

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I also have an EDM-030 with this problem.. It works perfectly fine when I launch music or video apps, but as soon as I run a game,the screen freezes within a few minutes, and then it shuts down a few seconds later. When the fault occurs, I get two error codes via the UART: 808B00FF and 80830018. I've already checked the MOSFETs and capacitors in the APU VRM, and they all seem fine.The thermal imaging didn't show any abnormalities either.I checked the VRM waveform with an oscilloscope, and the ripple is quite large. I replaced the XDPE, but there was no improvement. I noticed that Sony left out some filtering capacitors , there are unpopulated pads on the PCB,I added some extra VRM capacitors, which brought the ripple down,the ripple peak is currently around 20mV,but the fault still persists. However, I've noticed that some games can run longer now, while certain games still freeze during the loading stage. Should I keep going with capacitor replacements? Could this be related to the SSD? I'm not sure what to do next.
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Just to add: I rarely get freezes and shutdowns when running PS4 games. But even a fairly simple PS5 game (just a few hundred MB) can easily trigger a freeze and shutdown. So is this a hardware issue or a software issue?
 
Last edited by CZFX,
By any chance, did you replace the southbridge? Or was it replaced earlier?
In my case, I don't think the Southbridge is the culprit. PS4 games work fine, but PS5 games don't — that's the thing. I've read that the APU runs at lower clocks for PS4 games, while PS5 games push it to higher frequencies by default. Most similar cases I've seen point to a degraded APU power delivery system, always throwing the 808B00FF error. If the power delivery checks out, maybe the APU itself is on its way out? Thing is, I'm not getting any other codes — just 808B00FF and 80830018, both at the same time.
 
‌‌Latest update,I found that Error Code: 80830018 = SoC Sync Flood, and similar errors also occur on AMD platform computers. I think this may be caused by an APU defect — the APU cannot operate stably at the maximum frequency, but it works normally at lower frequencies. However, I have already checked the APU power supply and everything is normal. I tried modifying the circuit to forcibly increase the SOC_VSOC voltage, and then a PS5 game that used to crash quickly was able to run successfully. This gave me a lot of confidence, but in subsequent tests, I still encountered crashes in other games.Maybe I need to increase the voltage even more, until the APU either runs normally or burns out?
 
I would replace the XDPE controller and see if it solves the issue.
I saw your suggestion earlier, so I replaced the XDPE at the very beginning, but it didn't improve anything.I checked and confirmed that the XDPE is working perfectly fine.
 
In my case, I don't think the Southbridge is the culprit. PS4 games work fine, but PS5 games don't — that's the thing. I've read that the APU runs at lower clocks for PS4 games, while PS5 games push it to higher frequencies by default. Most similar cases I've seen point to a degraded APU power delivery system, always throwing the 808B00FF error. If the power delivery checks out, maybe the APU itself is on its way out? Thing is, I'm not getting any other codes — just 808B00FF and 80830018, both at the same time.
I wasn’t suggesting that you replace the southbridge. I was asking whether it had already been replaced, because it’s very prone to trapping flux residues underneath the BGA. If those residues aren’t properly cleaned and flushed out from under the solder balls with IPA (isopropyl alcohol), you can end up with exactly the kind of issue you’re describing.


I’ve had quite a few boards that were considered beyond repair, and all they needed was to be gently heated and have the flux residues washed out from underneath the southbridge. But if you’re saying it has never been replaced, then I’d start by checking for any abnormal readings around the APU power MOSFETs.
 

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