[Verizon LG G2] simon_lefisch:
Ok guys, heres a quick recap of why my phone was stuck in fastboot mode.....I tried to flash a rom that was supposedly for the VS980, but in fact was for the D802 variant. After I flashed it, it started up in fastboot mode. So heres what I did to restore to stock:

WARNING!! USE AT YOUR OWN RISK!! THIS WAS ALL TRIAL AND ERROR. I TAKE NO RESPONSIBILITY IF YOU COMPLETELY BRICK YOUR PHONE.

Below are the steps I used on Windows to restore my phone to stock, however I would have never been able to to do it without referencing THIS THREAD. PLEASE THANK THE OP OF THAT THREAD FOR FIGURING IT OUT. I take no credit for anything that is in the .zip file I am providing. All I did was use the included utilities from the referenced thread and swapped out the recovery.img and boot.img files for the ones associated with my phone (VS980). If you have a different variant, please click here to download the correct .img files for your model and replace them with the files that are in the zip.

Please note that I had a copy of the TWRP.img file and a backup of my stock ROM on my SD Card prior to using these steps.

1. With your phone in fastboot mode, connect it to the computer via usb and let the drivers install (you can grab the drivers at the beginning of this thread if you havent already).

2. Download the following .zip file from here and extract it to the root of your drive (ie; C: drive) [Again, the .img files in this ZIP are for the VS980 (VZW) variant].

3. Open windows explorer to wherever you extracted the .zip file to. Hold down the shift button then right click in an empty area to bring up properties and choose "open command window here".

4. Enter the following commands:

fastboot erase recovery

fastboot erase laf

fastboot flash laf laf.img

fastboot flash boot boot.img

fastboot reboot

After flashing the boot.img I was able to boot into the ROM I flashed (which was for the D802 variant). I went thru the setup but had no service. I connected to WIFI and opened the Play Store, where I downloaded Flashify. Once installed, I used Flashify to flash the TWRP.img I had on my SD Card and rebooted into recovery. From there, I wiped data/cache/dalvik/system and restored my backup of my stock ROM. Then I rebooted and was back on stock. Even though I was on my backup, as a precaution I went ahead and restored back to stock using the method in this thread (prob didnt have to but I was just paranoid and wanted to make sure everything was working properly) and the files from here. This is the VS980_11A stock files (which I believe return you to stock after the OTA). After flashing I rooted my phone and was able to install the correct version ROM I was originally looking for.

I will try to get a guide together for those of you who have flashed CM10.2 and are stuck in fastboot mode. I recently helped another member with the same prob and it ended up working, I'm just waiting to confirm the steps taken as that was also trial and error and he had no backup of his stock ROM.

Please let me know how this worked out for you, and again give thanks to the OP of the referenced thread above, as I never would have been able to get my phone back without referencing his guide.