Things change. Firmware changes the IR sensitivity of the STB and things go bonkers. The STB or TV is moved slightly, the issue is not the TV - perhaps another device like CFLs, or the sun, etc. You decide if you wish to follow up - suggest you at least check out the thread since there are a lot of possibilities outside of the TV. Just a couple of suggestions.It can't be IR interference, it's been the same TV for 2 years.