Corrupted or incomplete BIOS dumps cause "black screen" issues or "BIOS not found" errors. Use these checksums (MD5) to verify integrity:
Each file represents the operating system of a specific PlayStation hardware revision. Using the correct BIOS ensures the emulator behaves exactly like the original console: psxonpsp660.bin Corrupted or incomplete BIOS dumps cause "black screen"
Mid-lifecycle North American (NTSC-U) PlayStation 1. Version: BIOS v3.0. Corrupted or incomplete BIOS dumps cause "black screen"
The Essential Guide to PS1 BIOS Files: psxonpsp660.bin, scph1001.bin, and More If you are diving into PlayStation 1 (PSX) Go to product viewer dialog for this item. Corrupted or incomplete BIOS dumps cause "black screen"