A buzzing noise coming from inside the tv but still buzzes when on mute but doesnt buzz when tv guide is up on the screen or when a channel is showing what time it starts

Its audio output IC has damaged. Replace it.

Buzzing nois of this kind can come from a short or from disturbance.

Poor earth grounding.

Could be a bad ground and or a bad condensor.

I have this tv aswell, and yes I will confirm that it does buzz quite alot, but all plasma tvs do, it is to do with how it renders images, the buzzing can be made worse by it being close to a wall and it reflecting back. I found that my tv stand some how amplified the buzzing when i got mine. I dont think its something you can escape.

Mine i notice also when scrolling around menus seems to have lines that follow your selection....not to pleased about that

sounds like bad audio pcb if buzz comes thru
the speakers,

try replacing av cords..if not replace tv

I wrote a guide on how to fix this problem. It's really easy to do and only costs £1 (about $1!). You can view, download and print the guide here - http://www.scribd.com/doc/13515584/Polaroid-TLU03711C-Replace-Capacitors-Guide

sounds more like the graphics board in the set

blue screen is the noise mute screen. however the audio is not getting muted and hence the buzzing....meaning the tuner on the TV is not getting locked on to the station/frequency

1. check your antenna if you are using one. Autotune
OR
2. Reconnect coax from the cable box to Tv and autotune.
OR
3.Use the Video out from the cable box and connect it to one of the video inputs on the TV. Switch your Tv to that component. Use the cable box to change channels (Best case scenerio)