A strange thing happened to my TRX900LANC tonight, it worked normally before. One of my TRX900LANC keeps showing "no signal" on QRX100, and receive nothing while the UHF frequency set to exactly the same as the TRX900, and signal strength is at full scale. The Led light remains red on QRX100. On the TRX900LANC screen, the audio bar works just fine when connected to a microphone, the IFB RX and TX function works fine also. I can monitor the problematic TRX900LA via ERX2TCD. The problem is with the UHF signal decode I think. Have tried to change the frequency, mode, and checked the encrypting value is set the zero. Swapped the receiver. Re-burn the firmware. Didn't help at all. Try with the other TRX900LA, the others works just fine in every way. TRX firmware version is 8.77 QRX firmware 3.19 Any help?