Hey all, I just picked up an LG 47LX6500 (47" 3D LED LCD TV) from ebay, and I'm having the oddest problems with it. When I have an HDMI input connected (tried with a Miracast dongle and with my ancient PS3), the TV will power on via remote control or button push on the local TV controls... but shortly after it initializes, it beeps once, and the remote controls go dead, and the local TV controls also go dead. Whatever is currently being displayed continues displaying properly (including audio), but the controls are dead. I have to unplug the TV from the wall to get it to turn off. I have also observed that shortly before the controls die, once the TV turned the volume all the way down before beeping and disabling the controls, and once it turned the volume all the way up before shutting down the controls (luckily, there was no audio source at the time). I have also observed on one occasion a "function not supported" flashing on the screen before the controls died. It's behaving like it's being spammed with control messages just before it shuts down, and only with an HDMI input plugged in. When I use the VGA input (all other inputs are dormant), the TV behaves as expected (and I get no beep after initialization) - I can go through all the setup menus and test all the functions, browse the media library on the network, etc. I've read about various issues with the controls where the remote input gets "dirty" and requires cleaning (a can of air into the hole has resolved this issue for many, and some gutsy few have used WD40 successfully), but I have no input for the remote control - the only input I have is an RS-232 port (which may be my plan B, I can probably write up a short and simple app to control the TV via that port if it works when the local controls and remote don't). The TV has a beautiful picture that I'm 100% satisfied with, but the dead controls bother me. Anyone ever encounter this? Is there a "quick fix" for it? Can it be repaired at a "reasonable" price, or should I pack the TV up and return it to the seller as a broken item (it was purchased knowing that it had a damaged stand, but that the TV was fully operational (14 day return policy))?