I just did a 47" LG repair and was surprisingly straightforward. I followed the video (was a very similar TV) and took around hour and a half. Having a friend to help you is great though especially when lifting the LCD out of the frame.

The room I needed was a small (single) bed and a little table to place the TV when disassembling it.

Only one led had blown so I ended up just short circuit'ing it. You can tell a bit that the background is darker but worked well.