Wait a second, I think you are just booting the chip incorrectly.
For all PS2 games:
Tap reset once to power unit on from standby, insert game, close tray and tap reset to get game to boot.
From standby, press and hold reset until the eject light comes on, insert game. It will automatically load.
Disable/DVD Movie mode:
From standby, press and hold reset until you see the words "S*ny Computer Entertainment" and the chip will be disabled until you put the unit back into standby.
The Yellow PS2 auto-boots all. PS2, PS1 stealth and DVD movies.