Default Help with baseband unknown

No signal. The phone id is lost everything is 0 or unknown. I was watching a movie using a mhl cable to the tv and the phone rebooted and booted with no signal. I was on stock rooted 4.3 rom and was running that for months. I tried flashing back to earlier version 4.1 with custom recovery and with Odin. My question is. Is there any company you could send the phone to get it fixed. I'm currently Using it for a tablet for my daughter but i would like to sell it before she breaks it.

Sent from my LG-LS980 using XDA Premium 4 mobile app