Lorex DVR - Lost all Camera Images

I inherited a surveillance system that was previously connected to a PC. The card failed in the PC so I replaced the computer with a Lorex LH158000 DVR.

Everything worked great for about 3 months and then I lost images for all 8 cameras.

Is it likely that the DVR has failed or is the a power supply for the cameras somewhere in the building that might have failed? Other suggestions?

Thanks!

You are most likely right, look for the power supply for the cameras.