Your operator's manual should have an error code table in it, the high pitched tone is an alert to let you know you have a problem. Some times reprogramming the radio takes care of the problem, other times their is adefect that has to be repaired along with reprogramming
my software for programing my kenwood tk-290 says the disc is not formatted on this computer but...
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my software for programing my kenwood tk-290 says the disc is not formatted on this computer but works on mine is there a free programming software download