No picture.. I have a sony kp-51hw40 and I believe the bulb went on it. I have the audio but no picture.

Hello,,,,,
Picture mute is activated ,it can be vertical amp faulty or one of the c.r.t drive faulty,therefore the mute circuit is active.Increase G2 voltage for the any of the three c.r.t and notice screen .Vertical amp is faultry than you will see horizontal line across the screen and if you see full screen with flyback lines ,means c.r.t drive is having fault.isolate one by one c.r.t drive.
Gopali