I just installed a DUO chip on a v4 gap bios ps2.
I put in an original game and it ran fine, I then put in a backed up game and something weird happened. It read the game on the browser and then attempted to load it. I then saw this strange red looking screen I had never saw before, and it told me to insert playstation 2 disc to format, or something along the lines of this. Could this be from bad media? (memorex) Am I booting the system wrong? Just seems strange. Thanks