Typically Fault/Error/No Voltage/Low Voltage is a wiring connection.. Check the power receptacle first. Then unplug the power and remove the four screws to the control panel. Check the control panel connections to the interface board. Unplug and replug both ends of the grey ribbon cable from the interface board to the keypad panel, and from the interface board to the main board. Retest with power.





 

If necessary, examine all of the 4 sets of connectors pictured, especially the 6 pin molex. It may have connectors inside the plastic that have expanded with time/heat/fatigue.



There are four files attached relevant to your symptoms. One explains how and how to check connections. The other three how to remove the board and panel for inspection or replacement.

 

FAQ DVR POWER FAULT INTERMITTENT 6 pin molex

FAQ DVR Change the DVR CONTROL BOARD

FAQ DVR Change the Control Board DVR 3000

FAQ DVR Removal and Installation  OF NOVA DVR XP CONTROL PANEL