I replaced the bad lamp in my Mitsubishi TV. I have my picture back, but now the picture blinks in and out occasionally and I'm wondering why.

The original problem was that we had sound but no picture. After using the diagnostic feature, I got the code for a bad bulb so I replaced it. When I turned it back on, I had the best picture ever but with the white dots everyone talks about. Within seconds, my screen was filled with them. then the picture starting going in and out to the point I thought it was about to explode or something. I turned it off, waited a minute, and turned it back on and the white dots were gone. It continued to go in and out for several minutes, but that eventually stopped. Every few minutes it will still go dark on me for a few seconds and then come back and I don't know why. The picture quality looks amazing and the white dots are gone so I don't think it's the chip. could it simply be a loose connection? What else should I look into?