According to the fault table, LPF VMON is "incorrect bias voltages at the TR switch". I suggest you call or e-mail Elecraft Support with your concerns. 73 Bob, K4TAX On 3/11/2019 7:55 PM, Hisashi T Fujinaka wrote: > What does this mean? > > Other than that I can't transmit on FT8 right now? :) > > I'm running KPA1500 MCU revision 02.09. >