Have you tried re-seating the lamp? Pull it out, and then firmly slide it back in. Often times, that fixes the issue you're describing. Otherwise, you may have to have the unit inspected by a tech. If you find you need to do that, you can fill out the online service request form here:
I changed the bulb in my tv, old one was getting dim. My picture was great for about a month, now I turn it on the picture comes on, looks good and then in 70 seconds it turns off and the lights in front are telling me that the bulb is bad. I verified that the fans are working, no dust build up, and I have reseated the bulb. Can anyone help?