Run your file through an online MD5 checker to ensure it matches c53ca59089362518f817cb21d6eb1ecb . If it doesn't, the extraction process was corrupted. Games Boot to a Black Screen
Assuming you have legally obtained the file (or downloaded it from a public repository), here is how to use it. psxonpsp660.bin bios file
The emulation community eventually figured out how to extract this specific BIOS from the PSP firmware updates, resulting in the psxonpsp660.bin file. Why is PSXonPSP660.bin Preferred Over Standard BIOS Files? Run your file through an online MD5 checker