HLP5063 turns itself on when I plug it in and...

[tgray001]

it will usually work OK for a bit. There is never any control of any kind using the buttons on the remote or on the TV. After a varying period of time the picture starts to flicker a bit, sometimes looks sort of like a negative, and will eventually go dark (bulb shuts off). No indicator lights illuminated on the front of the TV. Sound still going strong. Lamp and color wheel were replaced a couple years ago. Tried a new ballast today but no joy. Any suggestions for parts and where to find them would be appreciated.