I have a Kenwood ts-430s with an display issue and it happens only while I have the radio on FUNCTION A. The radio operates normal, but after a while it gets a bit hot when touching the top cover. Then if I switch from LSB to AM the Frequency counter changes to a .5 only and no other number is displayed. I turn the radio off then back on and it works fine. It keeps happening if I do the same procedure over and over. But, if I put the FUNCTION switch to "B" that doesn't happen. Anyone has seen this issue?