LG G3 (d852), no OS, not loading into TWRP So I have been having troubles with my ROMs, and I decided to format everything to clean it up and do a fresh install. PC wasn't copying rom zip to the device, so I tried to use ADB Sideload and push the zip through that. Something happened on the Device's side, and I cancelled it, but it wasn't going back or finishing. I took a risk and pulled the battery, but now the phone boots up into the LG Logo boot screen, but does nothing from there. I am unable to boot into recovery from there, as if the buttons don't work. PC doesn't connect to the device, so I am unable to boot into recovery via ADB. Does anyone have suggestions or is the device completely bricked? 

edit: phone's LEDs starts cycling colours after a few minutes, and device manager detects something, refreshes, but nothing comes up. I'm assuming these LEDs mean that the phone is trying to boot, but can't boot into anything due to no OS installed. ADB still doesn't detect any devices, and I am still unable to get into TWRP from here.
Looks more like corrupted OS than no OS; try to boot into recovery by 1: remove battery 2: put battery back in, and power up by pressing both power button and vol up button 3: when you see LG logo release the buttons and immediately press them again to boot into recovery 4: perform a factory reset to clear corrupted files. 5: reboot.