V7 Strange Fault Any Ideas?

[fanta]

Thats why i can't get my head round what its doing
i thought ok 1st chip worked fine for week then stopped playing dvd-r maybe a loose wire couldn't find a wireing fault so change the chip for a duo again about a week later wont read dvd-r
tried new laser didn't fix it so fitted both chips to different ps2 both work fine
it realy does seem to be this V7 doesn't like chips