[Amps] Alpha 77DX

[Dan Hearn]

After 17 years of reliable service the set of 4 push buttons on the right
front refuse to latch when pushed in. Of course the amp will not turn on
then.
  The manual says that there is a solenoid below, mechanically connected to
the switch, which will unlatch the switches if the plate current is
excessive, turning the amp off
  I used a piece of buss wire, formed into a hook, to lift up slightly on
the solenoid core and found that then the switches operate properly. I
believe there may be a spring in the switch  to counter the weight of the
solenoid core when it is not energized. I believe one could rig a small
spring slightly off vertical to help lift the solenoid core but I feel
comfortable without the safety feature.
  I am considering disconnecting the solenoid mechanical pull wire and
using the amp without the plate shutdown feature. Replacing the switch
would be a difficult job. I will probably order a spare switch since both
of the switches on the left and right sides may fail completely.
. Has anyone faced and solved this problem by this means or some other?

Dan, N5AR