GEEETech i3 Randomly resets during printing

Fellow printer owners,

I have recently obtained a GEEETech i3 Pro B with an 8mm acrylic frame and a metal x-axis.
Soon after assembling the printer I started my calibrations and fine tuning, and the results are pretty okay if I say so myself.

However, when I want to print slightly larger objects then a bed leveling knob or a fan shroud for the MK8 extruder on the printer then throughout the print it randomly pauses/restarts or even completely resets.
I have tried doing the same prints with a USB connection using Repetier-Host 1.6.1 and a SD card running the latest Marlin 1.1.0 RC5 firmware on the GT2560 board that came with the printer.

Using a USB stream it randomly gives a Serial COM Error: System.IO.Ports.SerialErrorReceivedEventArgs! during a print, sometimes it waits for about 10 seconds before resuming and sending the buffered code and only leaves a little heated blob of material on the print. However, even if it resumes it goes on for a little while more and then stops again, but this time it completely resets the connection to the printer and the firmware reboots.

Using a SD card this problem is also existant, however when using a SD card the printer stops, starts beeping for a solid 5-10 seconds and then resets.
The LCD that is connected gives a couple of completely black characters over the original characters and everything freezes, I can't even at that point use Repetier-Host to connect to it anymore.
The only way around this is to completely cycle the power of the printer.

I have already checked my connections, my PSU and have also tried Cura and Slic3r but this does not give a difference.
The object also varies, and so do the times the printer fails.

Does anybody have an idea about what this could be?



Update:
I have tested the stable 1.0.2-1 release from Marlin but this gives the same effect.

Edited 1 time(s). Last edit at 04/09/2016 04:07PM by XDr4g0nX.

From what I can read, it looks like either you have a faulty board or power supply. If you can, request a replacement board and if it keeps doing it after you install the new board then you will have to replace or upgrade the power supply.

Thanks for the response ggherbaz,

I actually figured it out by going over EVERYTHING in the printer.
It seemed that the hotend thermistor was not properly attached and after a while shorted during the print which caused it to give such a random stop.