Just replaced lamp turn tv on shows 3 seconds of picture w/sound picture then turns blue With box saying "weak signal or no signal" with 2 black lines through it. sometimes if i press menu it comes up for a second and all of the text boxes have black lines through them. tv turns itself off cycle repeted until I turn it off
Sounds like a video input board issue... Where all the input's such as component and rca are plugged in.. Have you tried disconnecting all of connected devices? Maybe one of them has caused a short..
Try a simple single feed RCA video signal to see if you still have the same result...
If your TV has HDMI, try connecting an HDMI or VGA video source...