CD-RW wont read any disc

I have a CD-RW drive here that wont read anything, but I’ve tested it and it will burn CD-R and CD-RW just fine. It might be dead, but I’m in total denial and I want to know if there’s anything else on this earth that might cause it not to read. I installed this drive from another system, so I can’t really say much about the past. I’m an experienced tech who isn’t affraid of doing heart surgery on a drive if there are any difficult procedures that could fix it.
I even have a CD-R drive that reads fine that I can use for parts.
Any help would be fantastic…

Model Number: MITSUMI CR-48XCTE

Cheaper to just buy a new one for $30.

Not if I’d rather have a DVD burner. Besides, zero dollars is a great price!