ps2 version 3 console

[fazzyman]

I had my sons ps2 version3 console chipped a couple of months ago.the problem is that not all backup games will work.after booting up using the boot up disc I am left with a blue screen with a cd in the top right hand corner.I am being told that i would be better off investing in a more up to date model.
Is this right do I really need to do that any advise would be appreciated or better any better contacts for backups