Re: ICOM VHF repair (cheap)
I have an iCom M34 handheld that exhibited similar symptoms. I could not receive unless the squelch was set to 0. I believe that I purchased the unit in 2007.
I contacted iCom, and they instructed me to sent it in to their main repair depot. They also required authorization to charge my credit card for up to $82 (or thereabout). They returned it to me working 100% and classified it as an upgrade, and therefore covered under warranty. Total cost to me was shipping, or ~$7!
The radio worked very well from 2007-2012.