hifi engine

Yamaha ca 810 no sound, Sorted.

My Yamaha ca 810 has recently stopped working, When switched on the power light comes on but does'nt click on after a few seconds like it used to. All switches are in the correct position etc but nothing coming through at all.
I seem to have sorted the issue by gently poking about with a brush handle on the circuit boards and it has come back to life.

Hopefully someone can help, Many Thanks,