www.chinaphonearena.com

@"sspellmell"
Try to make a factory (hard) reset: [Only registered and activated users can see links Click here to register]
Also maybe reflash via lg bridge. Make sure you boot up after bootloader unlock and then go to fastboot and boot to recovery, don't flash it.
If this doesn't work, try to port a recovery for yourself:
[Only registered and activated users can see links Click here to register]&postcount=24 ,
[Only registered and activated users can see links Click here to register]&postcount=116
You can use that LGK8TWRP as "port" or you can also try to use Singular777's twrp ([Only registered and activated users can see links Click here to register]&postcount=126]) as "port".

If your device shuts down with the message "your device is corrupt..." after you finished the rooting process, read this guide: [Only registered and activated users can see links Click here to register]

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The "attached" file in the OP doesn't work anymore. This is the new file: [Only registered and activated users can see links Click here to register]

Also you can find some useful stuff on my xda thread: [Only registered and activated users can see links Click here to register]