You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
Check regulator voltages and work your way down the chain. It's not a 1 size fits all diagnosis but common causes is where I'd start. That's an old rig too, the electrolytic caps are probably pretty dried up as well.
This forum does not allow a single user to have more than one username. If anyone wants to change their username contact an admin and it will be done. Multiple accounts belonging to the same member will be deleted without warning.