Last month I bought a widescreen CRT TV and set it up in my front room. I found that when it was in use, there was a rattling noise coming from it. At first I thought it must be part of the stand it was on, resonating with certain frequencies from the speakers.
However, on further investigation, I’ve found that it happens even with the sound off, and the rattling seems to be coming from inside the back of the TV. It changes depending on what’s on the screen, too - so some camera angles are worse than others. The absolute worst seems to be when there’s a contrast of light and dark - like a 4:3 picture of a bright sky, with black on either side (because the TV’s widescreen). Once the TV’s been running for 30-40mins, the rattling happens less and less, and eventually goes away.
However, the problem seems to be getting worse, now that I’ve had this TV for 6 weeks or so it’s rattling more and more. I should investigate the warranty, and see about getting it sorted, but I want to know what’s rattling around.