The Card Cage cover has been removed.

Clear the security warning. See service manual chapter "Authorization to clear security warning on the projector".

Brief procedure to clear the security warning:

1. Ensure the cover plate of the Light Processor compartment is properly installed.

2. Ensure the cover plate of the Card Cage compartment is properly installed.

3. Start up the projector.

4. Initiate authorization by holding the security key in the security socket.

5. Enter the pin code within 5 seconds.

The cover plate of the Light Processor compartment has been removed.

Clear the security warning. See service manual chapter "Authorization to clear security warning on the projector".

Brief procedure to clear the security warning:

1. Ensure the cover plate of the Light Processor compartment is properly installed.

2. Ensure the cover plate of the Card Cage compartment is properly installed.

3. Start up the projector.

4. Initiate authorization by holding the security key in the security socket.

5. Enter the pin code within 5 seconds.

Defect security switches Card Cage cover (reference 1 & 2 image)

Replace DCI security switches of the Card Cage.

Defect security switches cover plate Light Processor compartment (reference 3 & 4image)

Replace DCI security switches of the Light Processor compartment.

Malfunction Signal Backplane

If switch replacement cures nothing then replace Signal Backplane.