Audio & Menu Screens but no picture

[sciascr]

My Samsung DLP TV HLN5065W1X/XXA got real dark and I replaced the lamp (lamp had more than 8600 hrs). After I replaced the lamp, I have audio but not video. I am able to see the menu screens but no picture. The TV is out of warranty. The TV repairman says that it is the light engine and it's too expensive to fix (in excess of $900).
Has anyone seen these problems before: Audio, ability to see menus, no picture? Is it worth fixing this TV for $900? Thanks

[Angel]

[sciascr]

Yes, it happens will all inputs. I tried to play a DVD and I have sound but no video.

[Angel]

Have you tried the HDMI input? If the problem persists when using this input then the digital video board is going to be the responsible part.

[sciascr]

This TV model does not have an HDMI input.
Would you know the part number for the digital board?
Thanks

[Angel]