Took the plunge and bought the sharp lc22sv2e. Really pleased with the picture and the automatic backlight adjustment works well in a darkened bedroom. I noticed a hum/buzz coming from the set during quite scenes. On investigatin I have found out that when the backlight is on full - the set is totally silent, but when the backlight is on medium or dark the hum kicks in and becomes really annoying. does this happen on all the sharps or is mine faulty? Early responses would be appreciated as I will be contacting the shop/sharp tomorrow.