Brewology

whenever i try to configure in recovery mode, my screen goes black
this also happened for my 3.40 oe thats why i upgraded to try and fix it, that didnt work.

Also can you play psx eboots on 3.51 m33, it hasnt been working, and it hasnt been working on 3.40 oe and never has

go into your flash 1 folder and delete the config.se file for your configuration to work.

Other than that you might have something corrupted in your flash files, make a recovery boot on your psp and do a fresh install to 1.5 and then back to custom firmware. Make sure you try 3.52m33 or 3.40oea for the most, because m33 is known
to have some problems in it.

I had that same problem, and yeah, recovering to 1.5 is the best way to fix it, unless you can find a new set of flash files, but then you could brick your psp.