Hacking Screen goes back during a game's loading sometimes on PSP 3000

[Windows_10_User]

Sometimes (it's very rare), when playing a PSP ISO, my PSP's screen goes black and I have no choice but to turn the PSP off. I have 6.61 PRO-C with Infinity installed.

EDIT: Sorry for the typo in the title.

 

[Windows_10_User]

I dowgraded PRO-C to OFW with Chronoswitch, installed ARK-4, then Infinity and finally made a full flash install so that I can boot ARK-4 without a Memory Stick/microSD card inserted on the PSP (or with a different one). My PSP's screen still goes black when playing PSP ISOs (it's still very rare).