PS2 Games Sometimes won’t boot up on CFW PS3 Slim

Familiar

Member
I'm at my wit's end here guys.

Recently modded my childhood PS3 to have CFW, and have been enjoying playing backups of my PS1 and PS3 discs. Strangely, PS2 games have suddenly started exhibiting a weird behavior seemingly at random. The pattern is always the same, but it doesn't happen every time for every game, and this occurs regardless of whether the title is launched from an official PS2 Classics PSN release, multiman .iso mounting, or webman .iso mounting.

1. Launch the game from XMB or multiman
2. Screen goes off (resolution switching it seems)
3. Screen comes back
Here is where the PS2 gods decide your fate
4a. PS2 logo comes right up and the game runs flawlessly. Good ending
4b. PS3 turns completely off. No beeps. No lights of any kind, not even the red standby light
5. Pressing the power button makes a beep and the red standby light comes back
6. Pressing the power button once more fires up the XMB like nothing happened

Some relevant information:
I have a PS3 Slim with low enough minimum firmware to run CFW, connected via component to a CRT. I have tried on two versions of EvilNat's CEX, as well as the latest Rebug just in case. As forums online sometimes cite heating issues, I have modified my fans to always run at 55% using webman. There are no overheating issues from what I can tell. I have done an SSD swap, and my data was all moved over. This issue did not occur after the hard drive swap, at least not immediately or noticeably.

I can't stress enough how random this is. You either get your game, or it fails the exact same way every time. The same game won't even give you the same behavior twice. Here's a screenshot of me playing SMT3: Nocturne, and the temps look great. Immediately after I saved my game, I backed out and tried to go back in. Failed to launch.

Does anybody know why this is happening, and how to fix it? Again, PS1,3 games run flawlessly, and even the PS2 games (both official and classics) run great if they manage to boot at all. Thanks in advance for your help!
 
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