Root ROM Manager backup has caused an infinite loop

[stev3nguy]

I rooted my LG Spectrum just a few hours ago and I tried to install a new ROM for the phone. But it seemed like I needed to back up my data first. So I backed my data with ROM Manager, but it immediately entered an infinite loop at the "4G LTE Verizon" screen.
Is there any way I can revive my phone? D:
I'd be fine with factory resetting it, but I don't even know how to do that.

EDIT:
So I figured out that I have to hold down the Vol. Down and Power key to factory reset. But this did not fix the problem... When I factory reset, there's a picture of the Android logo coming out of a box. I'm assuming this is the problem.

Please help me

 

[brianmaedche]

Did you ever get your phone fixed? If you haven't have you tryed the kdz method to flash the stock firmware?

 

[Neph81]

Stev3n, if you are still having boot loops, please try this method and let me know if it works for you.

http://androidforums.com/lg-spectrum/509694-how-recover-bricking-youre-phone-easy-way.html

 

[aaronp121]

ROM Manager asked me when I want to back up ROM to choose which model I use. I choose Nitro HD. But after reboot I see only one LG logo on boot and does not proceed past this logo. It write wrong recovery partition? Update: Aw Download mode working now suddenly. Earlier did not give chance to enable download mode. I pulled battery out and repeated many times. I got it. I did these steps: 1) Pull battery and unplug USB cable from phone and leave USB cable plugged to computer 2) Put battery back in 3) Press and hold volume up and down 4) Plug in USB cable with computer 5) Should now be in download mode 6) Release volume button. Tried with press volume button and power button at one time - not working.