It would be very hard to diagnose the problem from just the informations listed. My experience is a radio that has been sitting will have problems with the electrolytic capacitors drying out and throwing the receive tuning way off. The capacitors are the small metal can looking devices on the board. There are a lot of them. The top of them should be flat. If one is rounded on the top it is often times bad. Of course it could be a transistor in the receiver chain. Just one bad one will stop everything. It could also be a bad solder joint. You can try pushing gently on different places on the board with something non-metalic like the body of a plastic ink pen. Flex the board slighty and see if you get a change in sound or you can hear other stations. If so, you have the delicate process of tracking down the bad joint and repairing it. Just lightly using a solder pencil to remelt joints will often solve this type problem. If you can't find it then it will take a technician with the proper equipment to track it down. Good luck.
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I have several two way radios .The GTL 2000 does not recieve ( just a little noise) very soft.The audio amp is working as there is a hiss (very tiny) I tested the PA and works fine.My anttenna is tuned ,I have tried other speakers no luck.The signal meter on transmit works but when I transmit from another set next to it on same channel there is no signal meter response on the Cobra 2000 I have a Cobra 148 Taiwan made rig too and it transmits well but the volume is pretty low on it and again I have tested the adio amp and works well but replaced it just in case,I did have to change the voltage regulator.I do find that the voltage regulator and audio amp gets pretty warm a while after it has been switched on( this is now the 148.) So I have two Cobras the 2000 with no sound ,works fine on transmit and a 148 that has very low volume.Is this a problem on Cobras?
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