Hi. I have a LG 37LC7D tv. About a week ago, the TV stopped responding to a remote control (both the TV remote and the cable box remote) and we'd have to adjust the volume and power manually on the set. Channels could still be changed using the cable remote, as this was done through the cable box rather than the set. We've tried using a surface mount IR receiver, and it didn't fix the problem. Today, the TV started turning itself on repeatedly. I'd turn it off, and in seconds it would be back on. I've tried unplugging the set to re-cycle it, but to no avail. Any advice on how to fix this new power problem and the lack of responsiveness to the remotes?