LG BD670 Wifi Issues
Sorry for the Double posts here, but thought this merited it's own response.
I did a bit of research. Looks like lots of complaints regarding wifi connection problems/dropouts with that unit. Have a look at some of the negative amazon reviews, also saw quite a few posts on AVSForums about similar issues. As I said before some of these BR players have really poor wifi performance.
If I were you I would do one of two things:
1) Hard wire it with ethernet (maybe hard I know). For what it's worth I ran 100 ft. of ethernet cable through my walls and basement so I could hook up a second WAP at the other end of my house and for the deck/backyard.
2) Use the wireless network bridge with a second router as I described in the previous posts.