Originally Posted by geoffs
You should get noise form the set with the squelch fully open (anticlockwise) and the volume up full. No noise at all would suggest either a blown speaker or blown amp. I have appended the handset wiring diagram for you.
Does the TX indicator come on when you press the tit? If it does then you might get a click on your handheld at least telling you that the main RF power amp is OK.
Most faults with these sets were handsets followed by RF amp and occasionally a blown speaker.
Spares are not too cheap, but still available.
Plenty of noise from the set when squelch fully open . Not sure if the TX indicator comes on will check this out . No clicks anywhere when I press the TX button . Won't be back to the boat for a few days but will check out your suggestions then .