Hello, I have a Sony KDF60WF655 when I turn on the set the green light flashes a minute or two then goes solid green. There is no light from the lamp all fans are turning it never even tries to fire. I have unplugged the unit and that did nothing. I've already tried replacing the lamp and ballast, bipassed the lamp thermostat none of it made a difference.

If you got the voltage at the Ballast, it seems to me that it leaves the Micro. I believe the board that is on the Optical Block has the the data line to signal ignite for the Ballast. On last thing I thought of. I had one that had loose plug connections on the Main Chassi.

The Main Chassi slides out pretty easy. You may have to take a metal bracket off on the right side. When you pull the Chassi out you will see a number of plug connectors behind the upright boards. Make sure they are all totally seated properly. The ones that were loose for me were the ones with glue on them.

I hope it is not the Board for the Optical block because you must replace the Optical Block to get it. It is not available separately.

Good luck to you for the easy fix.

Skyassoc If you got the voltage at the Ballast, it seems to me that it leaves the Micro. I believe the board that is on the Optical Block has the the data line to signal ignite for the Ballast. On last thing I thought of. I had one that had loose plug connections on the Main Chassi.
The Main Chassi slides out pretty easy. You may have to take a metal bracket off on the right side. When you pull the Chassi out you will see a number of plug connectors behind the upright boards. Make sure they are all totally seated properly. The ones that were loose for me were the ones with glue on them.
I hope it is not the Board for the Optical block because you must replace the Optical Block to get it. It is not available separately.
Good luck to you for the easy fix.
Skyassoc