Here's my prob:
I bought and installed a Matrix Infinity (green dot from modchipstore.com) in my PS2 slimline V13. There was a little trial and error with getting it working / getting the soldering right, but I'm finally at the point that the when the PS2 powers up it shows the Matrix logo.
I can get to the config screen and that all works ok. It also boots PS1 and PS2 original discs with no problem. Trouble is, it won't boot burned...anything. I made a firmware update CDRW and that will only boot if I hold Circle while booting (but it did boot and I was able to update the firmware to the latest version). If I don't hold circle it won't boot, it just takes me to the screen asking me to insert a PS1 or PS2 formatted disc.
When I try to play a PS2 backup, it won't work at all (even trying the circle thing). Just goes to the 'insert a PS1 or PS2 disc' screen. Any ideas?