Panasonic TH-42PV500

[Geobelle]

My Panny is less than a month older and as I have noticed there's a sparkling occurs on the screen every 2 - 3 minutes when watching DVD's, it's quite annoying and noticeable especially when using the 16:9 aspect coz of 2 black bars at the upper and the lower side. Anybody can help me to fix it? Is it a cable problem? Same problem happens when I use DVI-HDMI cable of my DVD player. Do I need to call the Panny customer service? Thanks in advance.

Cheers,
Geobelle