Sounds like you have a dud, might as well root it, if it does not work anyway. Worst case scenario you can probably but one online for $0.00 or $0.01 and free shipping, check Amazon, NewEgg, and the other one I keep forgetting. There is a thread on thurs forum with it, look for $19.99 at Amazon.
Pretty sure you cannot kill the spectrum with rooting, only if you flash a ROM not made for it. Go check out the all in one rooting thread, read every post. Most issues you might have are discussed in the replies and all have been resolved.
Sent from my VS920 4G using Tapatalk 2
LG Spectrum -- Rooted and running CM10.1 official M2 thanks to TDM (and too many others to list).
B&N Nook Tablet 16GB -- running CM10.1 with 10 finger multitouch