Sony projection tv...Screen blinks on and off to black several times a minute...audio and everything else is fine

The light is blinking a code. The code will be a series of blinks, a pause and the blinks again. Phone Sony service and give them this code. They will be able to advise you as to the problem.

The 8 blink error indicates the flyback has failed. You can get the replacement flyback at the following link for your model sony.
http://servicemanuals.vstore.ca/product_info.php/pName/sony-flyback-145328551/cName/flybacks

NAKE SURE YOUR FRONT COVER THAT GOES OVER THE LIGHT IS'NT ON TO TIGHT ALSO CHECK THE 2 SCREWS THAT MOUNT THE LAMP COVER MAKE SURE THERE NOT TO TIGHT AND THAT THERE BOTH SCREWED IN THE SAME AMOUNT AND ALSO CHECK THE FAN ON THE BACK OF YOUR T.V. AND CLEAN IT IF NEEDED

try adjusting your color tuners located inside tv behind speakers.

All symptoms in your TV shows that you need to replace its Lamp as it has been consumed its life hours and TV requires new lamp. Lamp can be obtained from Sony Website. Price is $200, Hope this info will help you to enjoy your Sony TV in coming days.

Here's a shortcut to what the blinking codes mean.
http://www.somelifeblog.com/2007/08/sony-tv-led-blinking-codes-what-does-it.html
Strange how some people have 5 blinks. Most with this problem have 8 blinks (like myself)

I still have the blue-flash-then-shutting-off problem.. (8 blinks meaning voltage error) but I did fix the blue lines.. The lines across the screen can be very easily fixed whether they're blue green or red. . No, I mean REALLY easy. Took me longer to get the cover off. Once the front cover is off it takes 10 seconds. This link was also posted recently in one of the posts below as a solution..
http://www.somelifeblog.com/2007/06/sony-projection-tv-red-line-repair.html
(My lines didn't look like the ones in the picture mine were several evenly spaced blue arcs)

After some research I believe the flash/shutting off problem means the CRT is going. I've also read that it might be the D-board and I'm not even sure that that is... But If it is indeed the CRT then I'll let you know it's very difficult to find a replacement blue CRT as this part has been discontinued.. but I did eventually find an alternate to an alternate part (yes that's the 3rd alternate !)) online for $256. Here: http://store.tv-repair-service-salinas.com/8-733-649-35.html

If you're bold enough to attempt that then good luck and please let us know if it worked.
Or another alternative is there's a whole lot of Boxing Day sales goin' on right now.

You both have a bad high voltage Trippler block.

Try pushing the buttons on the remote and let me know what comes up on the screen if anything.
Display, Channel, 5, Vol Minus, ( Not plus ) then Power. This brings up
a screen with a list of the problems and number of times they have occurred.
Each of the problem names is abbreviated as, "OCP", "OVP", "V STOP", ETC.
We have repeated them in parentheses in the text for the "Blinks" described
above so you can correlate between the diagnostic screen and the blink
codes.

how many times does the light blink? There is a diagnostic set-up built into these Sony TV sets.