Hello, I have a problem with my sony rear projection tv. When I try to turn it on the standby lights blink but it odes not turn on. I turned it on using display 5 vol- power and it did turn on and know it shows something about selfdignose but I dont understand it, so i was wondering what might the problem be and how can I fix it. Thanks.

You need to count the number of blinks between the pause. Most common is 9 blinks. Also- after you press POWER, do you hear a "click" or not? If no click and 9 blinks, you probably have a "zero cross failure" and have two options:

(1) Replace the "G" board (part # A1054157A) or have it repaired (they repair it on eBay for about $40. You ship them the bad board and they either repair and return or ship you a different repaired board) A new board costs about $80- without having to send them your board.

(2) Repair the board yourself- by replacing the two diodes on the "G" Board - (D6301 which is on top- by the small transformer) and (D116 which is an SMT component on the bottom of the board- it takes VERY steady hands and a good solder iron). The parts should cost less than $25 and are available on eBay by searching for "sony a1054157a".
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Location of "G" Board on a Sony Rear Projection TV (KDP-51WS655)
Location of "G" Board on a Sony Rear Projection TV (KDP-51WS655)

Component D6301 location (Sony KDP-51WS55)
Component D6116 location (Sony KDP-51WS55)

Check out
http://www.techlore.com/article/15444/Understanding-Sony-Television-Blinking-Codes/