Why does the picture keep going out on my tele,
I get the picture back after warming the back with the hair drier, it is 7 years old, Gil.
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Product Troubleshooting for Televison & Video
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I have had several projection TV's do this and in most cases it has been cold solder joints on the circuit boards. There are some pretty large Capacitors and heat sinks on some of these boards as well as transformers that cause a lot of heat which results in the solder hardening up and cracking around the terminals. Most of the time you can take out the circuit boards one at a time and inspect them with a bright light and see the affected solder points. Using a magnifying glass helps. Most likely it will be on the bottom side of large capacitors. I usually just touch up the solder by adding a little bit of solder to all gray or dull or cracked solder points. A good solder joint is shiny and when you add new solder into an old solder joint it will appear shiny and be strong again.
WARNING: Be careful with the large capacitors. They store energy that can electrocute you even after the power is disconnected. Also inspect the tops of the electrolytic capacitors (these are round like a can with a flat top). If they are bulging on the top and not flat it is a sign that they are failing and could be related to your problems.