Malfunction software.

Reboot the projector.

ICP board is not correctly seated.

Reseat the ICP board. See service manual chapter "Replacement of the ICP board".

ICP board is not correctly inserted

Insert the ICP board properly. See service manual chapter "Replacement of the ICP board".

ICP crash. The most left LED is not blinking

Restart the projector.

ICP is being upgrading

Wait until projector reset after the upgrade.