LB1120 light stays red

You have posted your message in the section of this community given over to Nighthawk WiFi Routers. (This is easily done, given Netgear's complicated community structure.)

Many questions apply to different types of device, so you might get responses here, but you might get more help, and find earlier questions and answers specific to your hardware, in the appropriate section for your device. That's probably here:

Mobile Routers, Hotspots & Modems

I will ask the Netgear moderator to move your message.

No idea what the purpose of the attached photo should have in the subject context.

Please consult the fine user manual for LED indications and troubleshooting.

https://www.downloads.netgear.com/files/GDC/LB1120/LB112x_UM_EN.pdf