Simply put, bricking your device sucks. There is nothing quite like that gut-wrenching feeling when you hit the power button and the device just doesn’t turn on. It’s like being on a horrible roller coaster in a theme park called You’re Screwed, and leaving there can be a pain. However, for a lot of devices, there are fail safes. Many Samsung devices have their USB jigs, HTC devices can fix themselves as long as you can get into HBoot, and so on. The LG Nitro HD has now joined the club of devices that can, in fact, unbrick.
XDA Senior Member Machzelet has posted a very long, but very useful thread that contains a method that will help Nitro HD owners unbrick their phones. The process is very long and requires quite a bit of work, but when it comes to getting your phone working again, a little time is a small price to pay.
The method walks users through re-flashing every partition—from the boot.img to the system.img, performing a factory reset through the stock recovery in the process. The resulting work, if done correctly, should turn the phone back on. There are many quirks with this method, such as the firmware being restored to Korean by default, but Machzelet walks the users through each.
Those who have bricked Nitro HDs and want them revived can find all the information and downloads in the original thread.