Long ago I tried to make ps2 games work in my PS3 slim with REBUG CFW 4.84.2 but I always got a black screen and had to shutdown the console, after following some tutorials here seems like I opened a ps2 app and the console just became black screen but in this case I couldn't shutdown the console in any way so I had to unplug it, after that, everyime I use the reboot option or installing any feature which requires rebooting the ps3 in any CFW , the console gets black screen, cannot turn it...
Ps3 black screen locked after reboot or switching features
Ps3 black screen locked after reboot or switching features