1st off i hope i got the rite place for this thread, soooo soz if its not x

2nd, the problem....
I tried to play ff7 today, the ps2 starts up fine but as soon as it gets to the blue writing bout piracy the screen starts to wobble, it does exactly the same thing to ff9, but if i put in ffx , dc or a dvd its fine, i cnt work out y its not liking my ps1 games nemore, ive checked the wires and nothings lose, the disks arnt in terrible condition (but they not brill either) could it be the disks?? or is the ps2 jus gettin to the end of its life, if anyone has ne suggestions please let me know x