Netgear C3700 (N600)

> Ok, let me try to make this as easy enough. [...]

   It didn't work.  Please try to remember that the non-psychics in your
audience can't see what you can see.

> [...] there's no way I can run the cord from point a to point b. With
> this not being an option, is there another way of making it happen?
> [...]

   If you get more hardware.  There exist Powerline devices which can
(typically in a pair) use your building power wiring to emulate an
Ethernet cable.  So far as I know, the only useful way to add a C3700 to
an existing (modem+)router would be to configure it as a WAP, and that
requires a wired connection (or equivalent) to the main (modem+)router.

> [...] The current router that I have in the bedroom is an old Netgear
> Range Max wireless router. [...]

   How is _that_ connected to anything?

> [...] I do have a switch connected to the old Netgear range max
> router, which is how I'm able to have it on for the output of wifi.
> [...]

   What, exactly, is connected to what, exactly?  Hint: If a device has
multiple Ethernet ports, then "connected to device" is not enough
detail.

> [...] When I plugged in the c3700 in its place [...]

   See "What, exactly, [...]", above.  And how did you configure the
C3700 before/when you did that?

> [...] a main router/modem from my internet provider Grande. [...]

   What is that device?  To what is it connected (how)?