Originally Posted by
damanisjon 
Have had this Panny for about 2 weeks now and its been a nightmare!
Well thats a bit of a lie as I've had 2 gt50's so far!
As soon as I got my gt50, got it out the box and started checking out some blurays. The picture on THX settings is crisp and perfect in every way including the black levels, no trace of blur, bleeding or tearing. The tv was SILENT, no hum or buzzing.
About 3 hours into using the tv, black horizontal lines appeeared on the screen. The next day i took it back to the shop, they told me the unit was defective and it would take a week to receive my new unit.
Last week i picked up the new unit, as soon as I got it out the box plugged it all up, whats that i can hear? Really annoying buzzing coming out! Its like a rollercoaster of buzzing noise, goes up and down. As the whites on the image increases it goes nuts.
Straight away i called the shop, they told me to wait two weeks as the tv needs to run for a while for it to go away. And they told me that I need to buy and install a mains filter and that will reduce the buzzing.
Right its been a week, ive researched mains filters and reviews are really mixed. Not just that but I cant see panny developing a tv that needs further equipment to run properly. Ive had the tv running for hours too even while i been out the house and its not making any difference.
Dont get me wrong the buzzing is not super loud, but it still gives me a headache after 30 mins of watching tv even though my wife struggles to hear it, but then again she cant notice the different between SD and HD so....
Im trying to get used to it but I cant... and im 100% sure my last gt50 didnt buzz... should I carry on waiting for the buzz to go away? im sure that the longer I leave it the harder its going to be to exchange it :-(
sad times!