A set approaching 10 years old can have various capacitors on the verge of going faulty, especially in power stages, so no TV that has been seen to emit smoke no matter how little, should be switched on again until an investigation is made as to the cause, as apart from the fire risk danger its likely that a relatively small electronic fault could turn into a large one resulting in a much more comprehensive repair being necessary.

Every time I try a channel scan I get only a black screen when the analog channels finish and the OTA HDTV channels would start. I have a brand-new (purchased last week) LT-32X667 LCD HDTV. When I first plugged the TV in the Interactive Plug-in Menu did a OTA analog channel scan followed by a OTA HDTV channel scan. After that point I hooked-up a OTA HDTV antenna to this TV. But every time I try a channel scan I get only a black screen when the analog channels finish and the OTA HDTV channels would start. I've waited over 45 minutes but get nothing but a black screen. The only way to get any response from the TV is to start pressing the MENU button on the remote. The OTA HDTV tests-out just fine on my Sony HDTV and I've tried the channel scan in both AIR and CABLE modes with no difference. If I press the A/D button on the remote I just get a black screen on the TV and don't get back to the analog channels when I press the A/D button again: I need to press A/D followed by several presses of the up or down channel buttons to get a picture back. Is there any way to get back to the Interactive Plug-in Menu or do a true factory reset on this TV?