You can try cleaning the lens. You have to take it apart, and probably remove the disk clamp to gain access. Then take a Qtip with a small amount of diluted Windex or dish soap and rub the glass, carefully. It is not quite as delicate as a phono stylus but it is not rugged. Then take another Qtip and dry it. They try it.If it still skips the LASER is bad. they get junked up on the inside sometimes and also they just get weak. Not so much weak but I think their output pattern is not right anymore and it FUBARs the focus and tracking.
Older vid games used regular IDE drives but that may have changed. Get a picture of the plugs on the back, if it is a standard IDE or SATA drive you might be able to get a replacement for like $15 on amazon or whatever, put in two plugs and four screws.
But don't count on it.If it has the newer Apex style drive in it, it is a little bit harder to change, you have to deal with a flat cable to the LASER assembly. That is easy to break.
Another thing, I have access to drives that are pretty much standardized except for the tray and the front bezel. One might fit. but I need pictures first to see what kind of drive it is. Usually they are replaceable, it is just getting the replacement.
However, my guess is that you have a SATA drive with modified mounting. That means buying one online from either the bay or Amazon most likely. You can't unmodify that mounting without globs of glue n ****. Too much PITA.