I have not been able to consistently replicate this problem but it happens too often. I can be running SSB, Digital or CW previously. I power down the software, come back at a later time and the only output I can get is in CW mode only. SSB shows Mic level readings but NO output. SSB tune mode does not show output. If I switch to CW all works well. Back to SSB and NO output. This has happened maybe a dozen times. The only remedy for this issue is a reboot of the radio. Please advise!
Many times, unexplainable erratic issues are attributable to RF getting into the radio. If you have a dummy load, I would go through the same routine and see if the problem persists. Also, you might just reduce your power output substantially and observe the long-term results.