1) Bad lamp assembly.
2) Bad inverter board.
Possible Solutions (corresponding to the Causes #):
1) Replace lamp assembly (APR-CL). Replacement instructions: APR Camera Repair Instructions (lamp, inverter, camera module, fan).pdf (follow through page 2).
2) Replace inverter board (APR-BLPCB). Replacement instructions: APR Camera PCB Replace.pdf
If you need instructions on how to replace or check any of these parts, please contact our APR Support Team.