hello i have a philips magnavox 52" projection tv.recently the tv started making a very high pitched noise. ive noticed that this usually occurs after the tv has been on for 3 or 4 hours.So about a week ago i pluged the tv directly into the wall. This solved my problem for about 4 days but the problm is now back. also if i put a little pressure on the top of the tv pushing towards the wall behind the tv the noise stops but returns as soon as i move my hand. One more thing i have a 27" tv setting right beside the bigscreen could this be causing my problems? btw this tv is only about 3 yrs old. thanks in advance Brian