The LCD is for sure broken. In order to get a display back, you will need to replace the screen.
part can be found here: https://www.fixez.com/store/lg/lg-v-series/lg-v20/lg-v20-display-assembly-with-frame
Having a screen with frame saves you the hassle of having to re adhere the screen to its frame, so personally I would go with that part.
Repair tutorial here: [guide|113650]
Note: If you buy the screen with frame, you start putting your phone back together after step 15 in that repair guide, if you buy screen only, you will follow the entire tutorial.