Channel switching and indicator lamp in HRD not working

Hello Again,
Have a HRD I'm planning on selling. Turned it on the other day and noticed that the channel indicator lamp is dead and the channel switch is no longer working.
Might this be the 470 ohm R78, R79 problem taken to the limit ?
Haven't had the time to tear it down yet.
Thought this might have come up before.
My search didn't turn up any info that included the wrinkle of the lamp going down too. Just random switching. This is more like no switching and no indicator light.
Any thoughts ?
AW

There is a good possibility that your amp has lost the power source for the SS device that does the switching and the LED's. I am fighting a Marshall JCM2000 right now with the same problem....power source trails across 2 or 3 boards! What a drag.....Last time for me! LOL
http://www.schematicheaven.com/fenderamps/hotrod_deluxe.pdf
Look for the + and - 16 volt power sources.....you'lll find your problem area down lower...footswitch funciton on the left side of the screen. Two transistors and the LED's are over to the right.. Good luck with it.

Thanks very much Wally,
I'll check that out.
AW