IF YOU CANT RECIEVE THAT IS A VERY GOOD SIGN THAT YOUR SWR MATCH IS
OFF....I DONT KNOW IF YOU MATCHED UP YOUR RADIO WITH YOUR ANT.IF NOT
YOU CAN BUY A CHEAP SWR METER @ RADIO SHACK...CHECK THAT YOUR COAX
CABLE IS OK TRY TO REPLACE THE COAX......GOOD LUCK
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with this radio,I would probably go and buy another . It will be cheaper than having someone fix it.give more information about what its doing or not doing and maybe some one will give you the help you need but I would buy a better radio.
you may have to order one from radio shack because the wireing diagram is for that radio and mic only . You cannot use another mic on that radio , only the one that comes with it . If you are patient enough and have another mic with the same controls you could wire it up. it has to be ( I think a 6 pin ) ???
if you pulled it completely out you may have a problem . Trial and error is all I can tell you.Get a volt meter and check the mic pins on the radio . Ground one lead and touch each pin for ohms the first one to make noise is the ground. then touch the ground with one lead and touch the next pin and the next . now if there is any left over wire on the plug you can rewire it , then go from there.
test the internal speaker to see that sound is indeed getting to it.Hook an external speaker to it and see if that works.you just may have to change the speaker but it could be more than that. Do thisfor now then repost as to what you did and whether it worked or not because there is more problems and they are internal. Just go with this for now and if it doesn't work you may have to get it to a tech to repair it.
Do you have your channel switch ( the first switch to the left as you look at the front of the radio ) switched to a normal position ? If so, you may have a bad switch. Another problem could be a bad PLL Chip which is the frequency control device. I hope this helps.
As for the Guest post on the TRC-466, I would install a new mic first, as if there is a problem in the mic or cord, it will cause the sound to quit. Other than that, it would be a good guess that the audio chip is bad. Good Luck