philg

I've got an AVTech 675C DVR that's hooked up to 4 cameras. It seems to work fine during the day, but the system log reports that it experiences an MCU error every 2 - 3 hours at night. How do I find out what an MCU error is and why this error is occurring? I know nothing of DVRs, and would very much appreciate being pointed in the right direction. Thanks.