Panasonic Plasma TV Glitch, please help???

[Yautja]

I purchased a Panasonic Plasma TV the: TH-50PZ850A about 3 months ago last few weeks I have noticed a glitch if that's what you call it, basically the screen goes black & background noise can be heard but it only last's about a second!
At first I thought it might be the STB (Panasonic Blu-ray Disc Recorder with 250GB HDD & Twin HD Tuner [Model No: DMR-BW750])
Thing is I recorded a tv show onto the hard disc & while I was watchig it, it happened again so I decided to (REW) go back & rewind to check & see it the issue was there again or had been recorded cause I thought it might be a signal loss (arial) but it wasnt recorded or in other words no probs!

Has anyone come across this problem?
Don't know if it's the TV or the Digital Set Top Box?
If I watch the TV say for 4 hours it may happen twice!


Any help will be appreciated, thanks.