Hi, I have a Samsung TXN2730F analog TV. Since yesterday I am experiencing this problem. After the TV is ON for an hour or so it starts making a shrill buzzing noise (this is louder than the usual hum). I thought it might be some kind of electrical interference, so I unplugged everything else (VCR, DVD player). Still can hear the noise. I tried unplugging the Satellite box as well and even then when the TV is on still hear the noise. If I turn the TV off for about 15 min, there is no noise for the next 45-60 minutes and it comes back. anyone got any idea why this might be happening? Any suggestion for a quick fix for this problem? Thanks!