New poster here. I found this forum whilst looking for solutions to my problem on my (several-year-old) Samsung DLP. It's been a champ, and I've never had to even replace a bulb. However, recently (in the last week) it's started making a buzzing sound. You power it on, and it starts up just fine. After a few minutes a quiet buzzing sound starts, but it's low enough that it really isn't very noticeable. Then, a few minutes later, it gets really loud and makes it hard to hear the audio.
Picture and sound are playing just fine, so I'm not entirely sure it's the color wheel. I had the back cover off last night and the one fan I could see didn't seem to be obstructed and it spun freely when I pushed it with my finger. What's the best way to diagnose this issue, and has anyone had a similar problem?