If playing via USB on a real PS2, the ISO file must be defragmented. If the file is split across the drive, OPL will hang on a colorscreen.
The world of is a race against "bit rot," where dedicated communities and historians work to digitize over 4,000 titles released for the best-selling console of all time. The Quest for the "Perfect Dump" ps2 archive iso work
Even verified ISOs can fail. Here is the troubleshooting "work" you will perform. If playing via USB on a real PS2,