LAN port not working unexpected on 4 SXT devices

RouterOS Beginner Basics
1

Hi
I have problem with 4 SXT antenna
Lan port suddenly not works , no signal to lan card?.. :confused:
Pls any solution..
If there is any hardware issues, pls tell my the solution and where can i buy parts…
Thank you for support! :slight_smile:

2

Deleted because not related.

3

Sounds like it is losing power. How long are your cable runs?