Just turn the rocker switch
to off on the back of your ps2 while the ps2 is in stanby mode (red light
) and wait for a few sec. and power up your ps2 and carry on as usual..hehe..you only need the modchip in sleep mode when you go online as it puts your ps2 back to like there`s no modchip in it at all (original status) so you can load your original games.
But if you are just going to play original games without going online you can still use the same boot methods for ps1 or ps2 games and it will still load them.