ps2 troubleshoot....

[eatme]

k here is my progress,,,

My ps2 does play dvd ps2 games originals and cd originas and back up,,, will only play some dvd-r backups after first booting with a regular ps2 orinal (dvd format),

so i went on and openned it anyways and cleaned the lasers, and disassembled it, had my doubts about the chip. it is a real ms2 chip, took a picture of it but i think i cant post it here, anyways is an "actel a54sx32a -f TQ100 0302 ms2" printed on it, what ver is that??

I verified W and R wire for continuity and they fine. everything else looks fine i guess. All solder points have continuity and nothing seems loose.. what other tests should i conduct?? any ideas?? should i do the laser azymuth adjustment?? or should i just close it and see what it does now/? tnx a lot..