Your efforts to resolve the downtime issue with your RV340 Dual WAN Gigabit VPN Router are commendable, but you could try a few additional steps: inspect the system logs for error patterns, ensure stable WAN connections, disable any unused features to reduce device load, and as a last resort, perform a factory reset to clear out potential misconfiguration. If these measures don't work, reaching out to Cisco support might provide specialized assistance, or explore their troubleshooting resources online for targeted advice.
Shuvodip Roy