MX 5050 no Rew or FF

This is a problem I have now encountered too.
WPCHASE, did you ever get this resolved?
I've done all of the cleaning suggestions above. De-ox'd everthing: connectors, switches. Ohmed the switches, but stopped short of pulling components out.
Lots of Internet hits on this topic but nobody ever reports back that they fixed it.
 
Found the problem. The EDIT switch. Like the rest in that bank (power, reel and speed) it’s a DPDT, and its normally closed contacts read open. This prevents FF or REW from engaging. No amount of DeOxit will restore the contact. This is one stubborn switch!
Removed the switch and dropped some 91% isopropol alcohol down the shaft from both sides, which brought back continuity. Allowed it to dry then gave it a Deoxit chaser. Good for now.
 
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