I have a Yaesu FT-991A and its been working fine went to turn it on 2 days ago it tx and rx but when I push the F/M-List button it does not work. I can not get into the F menu The Fast and Lock buttons does not work either. Everything else seems to work I just can not get into the F menu I tried unplugging eveything did full reset and still no good. Won't even read the firmware version when I push A=B & A/B when powering on. I did have it working once last night when I held the F button and powered it on but that trick won't work today. Anyone have a Idea before I ship it to Yaesu?