My plasma is about 1 1/2 years old. Worked fine till now. I turned it off by the switch on monitor and turned it back on before red blinking light stopped blinking. Would not power up, so unplugged, waited a few minutes, plugged back in, red light came on, pressed input/on, worked fine except when I turned it off, red light won't come on and input/on does not work. Did this several times and sometimes it would power on, sometimes not. Now it won't power on (red light). Anyone have this happen or know something else to try? I appreciate any suggestions. Thanks.