A board in the Card Cage has been removed.

Clear the security warning. See "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 that all boards in the Card Cage are properly installed.

3. Start up the projector.

4. Initiate authorization by holding the security key in the security socket (image "Dallas key slot") .

5. Enter the pin code within 5 seconds.

The cover plate of the Light Processor compartment has been removed. Security switches are activated (reference 1 & 2 image "Light processor cover tamper switches").

Clear the security warning. See "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 that all boards in the Card Cage are properly installed.

3. Start up the projector.

4. Initiate authorization by holding the security key in the security socket (image "Dallas key slot") .

5. Enter the pin code within 5 seconds.

Defect security switches (reference 1 & 2 image "Light processor cover tamper switches").

If all compartments and devices are installed and security error will not authorize, replace DCI security switches.

Malfunction Signal Backplane

If switch replacement is not the solution, then replace Signal Backplane. See "Replacement of the signal back plane".