Samsung HLN507W1X/XAA Service Manual page 36

Alignment and Adjustments
1-11-2 BALLAST replacement Method
Failure type : The lamp does not operate.
<
1. Loosen the two screws which hold the lamp in place, and then remove the lamp.
2. Loosen the screw which holds the connector in place.
3. Loosen the four screws on the ballast board.
4. Replace it with a new board and re-assemble it in the reverse order.
1-34 Samsung Electronics