Q: Why does my dot matrix display go blank?

A: There are several possible answers to this:

1. The display may have lost power. If this is a discrete input display, verify that there is 110vac present on the 2 outside terminals of the JP1 connector.  If this is a Microcomm® input display, verify that there is approximately +24vdc present between terminals 1 & 2 on the J2 connector.
2. If the display has power, then it may be due to the presence of an incorrect input signal.  Verify that only the current floor signal is active.
3. The problem could be caused by incorrect programming of the display. Please contact CE Electronics technical support with the SN# from the white label that is typically found on the side of the transformer so we can determine how the display was programmed.