the 254 will not do wifi without an extra dongle attached.
You will need to run a hardwire

reset will be okay.

i think the server info may even stay in tact, but not sure about that.

Try pressing the setting button a few times when the blue screen come up

And not every dongle works with the mag 254 , I had one that didn't work, I had to purchase the aura hd wireless adapter

Check this link for wifi dongle info and setup
- https://wiki.infomir.eu/eng/stb-webkit/mag245-250-254-255-270-275/embedded-portal/supported-wi-fi-adapters
/kens

If you're seeing your wifi connection in the Mag network menu, your wifi is working fine.
Something is wrong with the password your entering or the way your entering it.
Did you figure out how to get out of the DHCP loop yet ? I'm guessing you have by now.
Sorry for the poor help your getting.....

Ok I just picked up a 254w model. I got it going with some reading here, a reset and other stuff. Wifi or Ethernet did not seem to be a problem. Look at this image of my device, remote and interface. Initially my screen appeared "locked" on this STB block. ON the remote is a settings button with a gear icon. Pressing that pulls up the next interface for settings. Using the Home button is back, I choose network using the arrow keyring and select using ok. If you have wireless go down to Wireless(wifi) and select it, you see DHCP, auto DHCP,manual DNS and Manual. Choose Auto and use OK , be patient. It may take a moment to scan for wifi then load a list. Mine was scio passim, move down using the key ring and on the field, using the keyboard key to bring up the keyboard, Maybe your mag has that section. If it does NOT, go back , choose Ethernet and choose DHCP then save and use home to back out. until you are at "System Settings" go down to "Network Info" and choose either wifi or Ethernet to check a connections status. You get that detailed screen with your MAC shown, and your IP if you have one. If the Ethernet status shows DOWN, You likely lack a physical LINK to your router, IE bad dongle. Duly noted in the thread by Kens and IPguy. I would want to make sure your cable in the router is in the LAN port section of your router and showing a link light in the LED to make layer one connection confirmed. I posted a lot of pics of the mag interface.

https://ibb.co/hqNyC5
https://ibb.co/hmRrX5
https://ibb.co/idCLQQ
https://ibb.co/fVCn5Q
https://ibb.co/jH3ukQ
https://ibb.co/cOhn5Q
https://ibb.co/fVCn5Q
https://ibb.co/jH3ukQ
https://ibb.co/jSyrzk
https://ibb.co/bULRX5
https://ibb.co/b7yrzk
https://ibb.co/jrmYC5
https://ibb.co/mRs6X5
https://ibb.co/hg9mX5
https://ibb.co/iO0tC5
https://ibb.co/eHrN5Q