No device found

> We've have the 7000. [...]

   Not a model number.  Look for "Model" on the product label.

Firmware version?  Connected to what?

> [...] Now none of the devices show up. [...]

   _Which_ "the devices" don't "show up" _where_?

   A vague description of what does _not_ happen is less useful than a
clear description of what _does_ happen.

> [...] Shows it's online, but nothing connects. [...]

   What, exactly, shows what, exactly, how, exactly?

> [...] Only the 2 lights on the left are on.

   Those LED indicators have icons and titles.    Also colors and
activities, neither of which "on" describes.

   None of that is a useful problem description.  It does not say what
you did.  It does not say what happened when you did it.  As usual,
showing actual actions (commands) with their actual results (error
messages, LED indicators, ...) can be more helpful than vague
descriptions or interpretations.

   Visit http://netgear.com/support , put in your (actual) model number,
and look for Documentation.  Get the User Manual (at least).  Read.
Look for the LED descriptions and "Troubleshoot".  Pay particular
attention to something like a "WiFi On/Off button with LED".  Did you
press it?  Further reading might not hurt, either.