Philips 27PT543S 27" TV
High Pitched Noise
I bought an older model of this TV about 3 years ago, and I also have had problems with the high pitched noise it gives off.  It's incredibly annoying and distracting when you're trying to watch a good show.  The sound is of course most noticable when the volume is lower.  I wouldn't buy another Phillips.  Pay a little more money for a better brand!