The unit is factory issue. I've cleaned the laser lens multiple times. For some
reason, I've found that it always puts a lengthy, single mark/line (not a
scratch) on all my discs. The lines goes completely across the surface. The
mark/line can be largely wiped away, but a faint outline always remains. Does
anyone have an idea as to what the problem could be? Also, is there any way to
fix a loose button? It's the flat type you push up/down to change tracks (not a
knob). Thanks for your help.