Ihave a KX-T0141 RC connected to a PBX, and have followed all the programming and installation instructions time and time again..Following instructions for setting KX-TD7680 into test mode for testing signal , I continue to get SEARCHING I have tested KX-TD7680 battery for voltage, I have tested KX-T0141 with other Portable ,same model. I can not find any info to see if there is a firmware update for the KX-TD7680 (if that could be issue).