The picture no longer shows picture yet still has sound. The issue?

The picture on the Samsung Slim DLP TV no longer works. It left suddenly the other day. A few days prior, it began making a slight crackling noise especially when first turned on. The sound is still in tact. Here is the TV info.

Model No. : HL-T4675S

Serial No.: AHE83CMP800808L

Version: PA01

Lamp Code: BP96-01653A (P132W)

BP 88-00633A

Model Code: HL T4675SX/XAA

Please advise of what the issue likely is and how to proceed with fixing it.

Thank you!