I have a Panasonic TH-42PX50U plasma that I have had for about a year now. It is in my bedroom and is hardly used, only if I feel like laying down and watching a show. It has probably less than 200 hours. I just started hearing this click-click noise while the tv is off. It is the same sound as if I was to turn it on or off. I thought maybe the tv was turning off and then back on momentarily but I am unable to catch it doing it. It doesn't do it all the time either. Is this normal or is something wrong? Please help me out, Thanks