I tried a repair of a Unidisk that wasn't working and had an oops 2 days ago: I tried it on my Laser 128. PHZZT! sound so I unlugged fast! to late. The laser still boots, at least fromt he internal 5.25, but, the RCA jack produces no picture so, I plan on taking it apart and seing if I can retrofit what is left of it + parts froma blown 128EX and see what I can do....when I get around to it