My iCom IC-751A has developed a glitch and I have no idea what might be causing it. Shortly after I obtained the radio, I read about the volatile memory and how the radio would quit operating if the soldered-in coin battery ever died. I replace the board with a non-volatile memory board made by Piexx and the radio operated flawlessly afterwards. Now it's developed an issue with the programmable frequency memories in that I can program a memory and it will remain in memory until I program another memory channel. When I program another memory channel, the first one I programmed disappears. It's like it will hold only one channel instead of the 32 channels it's designed to. I replace the battery on the Piexx board and the problem still exists. It's not a major issue as the radio still operates just fine in VFO mode and I have the external keypad that allows quick entering of frequencies. Anyone else ever have the problem and, if so, how did you cure it?