Hi, I also had blinking light issue, 6 long and three short. Eventually couldnt get tv to turn on any more. After several hours of navigating these threads, determined it may be capicitor issues. Took off the back cover and sure enough the two capicitors they were talking about were bubbled up and one had black stuff on top of them. So removed board and took to local electronics place and they changed them out within an hour, cost about $65. Took home installed and works as good as it ever has. Bought in 2004, has 20000 hrs on it! I figured what the hell, if it works great. If not, new tv time because cost of analyzing the tv and possibly a new board would equal a low-end plasma now.
Did all in one afternoon!