I had just hooked up a home theater system I just got today, and when I used some component cables it wouldn't work, and then switched it to a regular yellow composite cable. After watching a DVD for like 5 min I turned it back to regular TV (just standard cable) and a blue/green/purple spot showed up in the corner of my TV. Is there any way I can get rid of this? It just happened right after I hooked up the DVD player. Am I gonna have to get a professional to fix it? We just bought it less than a year ago and its a Toshiba 32" flat screen non-HD.