Sylvania 27 inch stereo flat screen tv

The vertical deflection has gone out. Put it in the shop.

Hi! yes it can be repaired

One or more electronic components was burned or deteriorated inside the tv.

Replace the TV.

You plasma still under manufacturers warranty. Most electronic devices have one year warranty.
The failure in your TV can only be corrected by repairing it.
I would suggest to call philips and ask them to find you an authorized repair center near you to get your TV fix under their warranty.

Does anyone know where can I buy a screen for a 27" LCD Insignia TV. Model is NS-27LCD? My screen creaked. I checked out e-bay and have not found a broken TV with a good screen. Does anyone know where I can buy a screen at. 
Thank you all for you time. 
JC 

Get a new TV

Mine does this all the time. It appears to be a factory flaw. The only way around it is to set the channel you are watching to "MONO" and the crackling sound will disappear.

seriously its a difficult problem, well sometimes the system control needs a heat-up by resoldering it. or caused by the flyback and the horizontal transistor. reply me if the problem persist. ^.^

It sounds like your vertical has shrunk, causing the picture to look squashed. Most likely a bad component in the vertical output stage.

Probaby the stereo decoder IC went bad or a supply voltage to it is too low or noisy. If it has audio output jacks on the back of the TV, connect it to an external amplifier and see what that sounds like. If it is ok in stereo or mono mode then the amplifier in the TV is bad. This will prove that the stereo decoder is ok.