If you have placed the raw files in the correct folder and the error persists, run through this checklist. Do not skip steps.
EmuDeck, through its PCSX2 configuration, expects these to be in the correct directory, , and with correct checksums. emudeck ps2 bios not detected
If you ever run EmuDeck’s "Reset Config" again, you will need to re-verify BIOS detection. If you have placed the raw files in
scph39001.bin (main BIOS, varies by version) rom1.bin rom2.bin erom.bin If you ever run EmuDeck’s "Reset Config" again,
What or behavior are you seeing when you try to run EmuDeck's BIOS checker?
Use an existing PC DVD drive (yes, a standard computer DVD drive can read PS2 discs if you have the right software). Tools like "PS2 BIOS Dumper" or extracting via "Imgburn" plus a specific plugin are the most common routes. Search for "How to dump PS2 BIOS from disc using PC" for software guides (remember, we can't link to the files themselves).