He had the same problem as I and others in the listing. His solution was to test the thermolimiter, first. That the problem was probably not the resistors themselves, but this thermolimiter.
I checked my resistor pack, today. Resistors ok, thermolimiter - dead. If this part is still available, Dave said he found one at Radio Shack, then a $7 fix is better than $25.
For the electronically inclined, can the termolimiter be tested to show 1.) It is not the right value, so it fails. Replace it with one of a higher value. 2.) It is not necessary, remove and replace with a jumper. (could be dangerous, may cause a fire).
I would appreciate any and all replies.
'90 80 black