Samsung DLP TV Pulses after replacing color wheel

[KnickNut3]

My Samsung DLP TV (hlp5063wx) was buzzing loudly, and I was able to figure out that it was the color wheel. I successfully replaced it using the instructions on this page, http://www.jangro.com/electronics/samsung-dlp-replace-color-wheel/ , and my TV works without the noise of the old color wheel now. However, my TV image will "pulse" at random intervals. On average, about once every 30 seconds the screen will become brighter for one frame, then return to normal. This never occurred with the old color wheel, but with the image problems occurring at random intervals, I don't think it's a simple bad color wheel issue, and it's not like the consistent flickering problems I've seen videos of. Any ideas before I tear everything apart and send it back? Thanks.