I have a Mikrotik LHG LTE18 kit (LHGGM&EG18-EA) external router which worked correctly until a few days ago.
Now connecting with Winbox to the router we see that the LTE module has disappeared from the list of available interfaces and obviously the connection does not work:
If instead we go to "resources -> USB" we see that the LTE device (Quectel EG 18-EA) continues to appear and then disappears among the listed devices. It almost seems like the LTE module can't communicate with the main board:
After a few seconds the board appears and then disappears:
What can I do to solve the problem?