When I turned on my projection TV, the screen flashed red and the picture went black. The red power-on light is flashing 3 times and I have no picture.

Model# PT-47WX42

Looking for a probable cause or a document that I can use to troubleshoot.

Ty in advance.

Projection TV: Have you checked the projector bulb?

There's a troubleshooting chart in the user manual:

PT-47WX42 User Manual (http://service.us.panasonic.com/OPERMANPDF/PT47WX42F.PDF)