Print just stopped, motor/stepper driver issue?

Just testing out my printer rebuild and I started with the xyz calibration cube from thingiverse.
Must have got somewhere between 4th and 6th layer when the printer just stopped. No errors on LCD or anything. If I cancel the print then the extruder moves back to 0 X 0 Y position.

Any Ideas where to look?

Overtemp protection of a driver? They usually start again after a few seconds, but then the print is messed up already. Next time, just wait and see.
If the whole print stopped, it might be the onboard 5V regulator or the polyfuses ( Atmega/Ramps combo )

To check for over temp, would a quick feel of the heatsink be a good indicator?

I am running TMC2100 on all motors except extruder as that wants more current so I am using DRV8825. I did check that and the heatsink was cold.

I am running a MKS GEN 1.4.

Did the motors all stop at the same time? If so, it's most probably not a driver problem.

The MKS gen has the same crappy 5V regulator, IIRC.
Not sure about the polyfuses, tho.
Graphic LCDs can cause overheated 5V regulators. ( backlight too bright? )

Edited 2 time(s). Last edit at 07/19/2018 02:01AM by o_lampe.

So I had a go again last night.
Printed the cube again but this time it printed all the way. Print looked bad so I then calibrated the esteps.
Went to print the cube again and it froze again at about layer 4/5

I quickly checked all the steppers and they were cold. Motors didn't seem hot either. Tried moving the z up and down via touch screen and it didn't do anything. Tried a pause which moves the extruder to a safe place and nothing. After about 5 mins I pressed stop and extruder move back to 0,0.

My LCD is a MKS TFT32 which I believe is 12v?

I unplugged the LCD and printed via octopi. Print worked fine