He stared at it.
Open PCSX2, go to Settings > BIOS , and ensure "SCPH-90001" or the equivalent "USA v18" option is selected. Scph-90001-bios-v18-usa-230.rom0
: The model number for the final "Slim" PS2 released in North America (the "1" denotes the US/Canada region). He stared at it