EG4 › inverter control board and firmware
Inverter shows no display, no power indication
reported more than once
Symptoms
- A unit that worked briefly (or never at all) stops responding completely: no display, no power indication, an 'm3 rx failure' error, or (for a battery) will not power up despite correct terminal voltage
- Troubleshooting rules out wiring and finds nothing recoverable
Alerts and codes
M3 Rx failure
The cause and the fix
Subscribers see the cause, the fixes that worked and who did them, part numbers and recent prices when a part is involved, and the field reports behind this entry.