So, I dug the old broken Marty out of the closet today.  It will not read CDs, 
adjusting the laser pot (it only has one) does nothing.   So I finally took the whole 
thing apart to look at the board (pain in the ass due to tons of shielding plates.
Only thing I could see are these caps.  The have black stuff on top that looks like 
magic marker.  One swipe with a tissue wipes it off.  Are these caps bad?  I've seen 
brown stuff from caps before, but nothing like this.
