Batboard

Greetings;
I have a dash mount 900 mhz spectra. The original control head does not funtion; I.E. does not power up the radio. However an identical control head works fine when I replace the original head.
How can I troubleshoot the original head and/or does anyone have any idea what parts may be bad?
Thanks for your help.
FRED
KI6EAY

Hard to say Fred, without accually having the head in hand. Then you still need a service cable so you can get to both sides of the circuit board.

Most comon failures are the leaking capacitor dammage, folowed by the burned trace from too large a fuse in the IGN cable. Then maybe a bad contact on the switch pad.