Creality Ender 3 Printer stops mid print

I'm having some major issues with large prints on my Ender 3. 

Any file that I attempt to print that takes longer than about 7 hours causes my printer to crash. After crashing, I can power-cycle the printer, select resume print and most of the time it resumes right on point and the print finishes (sometimes I get terrible layer shifting but that's most likely another issue.)

Steps to recreate:

Save gcode file to sd card.

Plug in sd card to machine which is already on

Select refresh SD card and select print

Allow print to run for about five to seven hours

Printer makes a loud beeping/screeching noise

LCD screen flashes blank, between lit up and dark, briefly showing ender logo

Print head stops in place on the print

Everything starts cooling down

LCD screen remains backlit but with no text/other info

Printer sits and waits for me to rescue it

I power cycle the printer

Select to resume print

Nozzle etc reheats and print resumes

I've found in forums other people reporting this same behavior but so far no resolutions that have worked for me. Has anyone fixed this behavior before? Does it sound like a defect? 

I did accidentally sever one of the cables to the z axis at install, but repaired it. I don't think this is the problem as I'm not having any other electrical type issues with the product. In the beginning the printer could handle long prints and I've completed several of the same gcode file without issue before this began happening. 

Please let me know what specific additional information could be helpful and I will happily provide it. The printer has a lot of potential but this is kind of a killer for me and I need to figure out if I should just send it back and start over again.