Hello Annie D, Dave here! So I think I may be able to help you. What I'll need first is the model # of your 42" Matsui plasma TV. I need to see who makes your TV.
I have in the past seen this problem on many LG made plasma TVs. All that may need to be done to fix the Red, Green or Blue specs your seeing all over you screen is just to make an ajustment on the Y sustain board.
Please feel free to give me a call or message me back with the model # of your TV. My name is Dave and my contact info is. Cell#: 1-503-432-9904 / E-mail: pleasefixitdave@yahoo.com
Dave
December 2008