sometimes when I power up RUT240 all LEDs stays on (Power Led, all 2G 3G 4G LEDs, all Signal Strength LEDs, LAN LED, WAN LED) and never turn off. The LAN and WAN LEDs turn on even if no cable is plugged in.
When this problem happens, RUT is not accessible neither via LAN nor WiFi. In this situation, RUT can not be reset by pushing the Reset Button. The only solution is plugging off the Power Adapter.
What could be the problem?