Doser 2.1 not connecting to WiFi and LAN

hi GHL team

I have an issue with my Doser 2.1 where I need help
2 days ago I noticed that I can not connect to my Doser 2.1 via myGHL so have tried to connect via GHL control center via USB which worked.
Problem is that I can not find any wireless network and even I'm not able to connect via LAN. using network cable which works for my notebook.
also I do not see any yellow , green light when I do connect LAN cable to network port.
I have latest firmware and also using latest GHL control center. pls help
thanks
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Is there anybody competent from GHL to reply?

Hello,

use a static IP-address, so that you know the IP of your Doser.
Here's an instruction: https://www.youtube.com/watch?v=PHCcd1tQQrA

Ok, will check once I'm back from vacation. Still hoping that nothing goes wrong and my doser is up and running as I'll be back only in 10days.