I've got two PC-FX systems one is as good as new and every game I've put in runs without a flaw.
The other has not been treated as nice as it should have!!
(That is until it came in to my protection!
)
However that system skiped a lot in intros, I calibrated the laser and everything was hunkydory. Until i got a copy of Battle heat ( not a copy copy but a an original copy! sort off... you know what I mean!!) Anyway it skipped a lot on the not so nice system but worked fine on the next to new! ? Guess what? The CD was dirty!!!! but so little it was hardly visible!!
So perhaps your system has been used alot in the past? and sort of worn out? and now everything has to be superclean to function properly!!