Really need some help. Let me run you through as much as possible. I have a replicator 2x. Ive owned this for around 2 weeks now (used). after some teething issues ive been printing really well all week.

I left a print for the first time to run on its own and when i returned it had stopped after aprox 10% was still on and on the main menu screen.

I removed the partial print and since then when I go to print or preheat it will reset near the max temps. (230 extruder and 110 platform) Individually set these all achieve desired temps, and change filament still works.

I swapped the LHS extruder parts for the RHS and tried a reprint, same. I swapped the wiring at the board to use the LHS extruder wiring for the RHS. same. Disconnected the stepper motors and same issue. Reinstalled firmware. Same

It was running the mm2x upgrade, and I was supplied with the original extruder and thermocouples, spent afternoon swapping and this has the same issue.

By reset, the whole unit goes dark (LCD and LED), beeps and back to main menu. It works with the bed unplugged, or the extruder heater unplugged, but not with both plugged in. Heard this being called brown out.

Im guessing its the mightyboard or the power pack. All lights are green on the board during running. I have a multimeter and can test the board if known values or a guide location is available.

Any help would be great, pulling my hair out.

  • $\begingroup$ Welcome to 3dPrinting.SE! $\endgroup$ – Pᴀᴜʟsᴛᴇʀ2 Oct 13 '19 at 18:32

"Im guessing its the mightyboard or the power pack."

Right track there. Usually this symptom suggests your heaters are overtaxing your power supplies. Since you swapped extruders already, the heating elements and sensors in those are not likely to be an issue. That leaves the bed heating element and power supply.

A resistance measurement can help rule out the bed heater but since it works without the extruder, its probably not a severe issue there.

If I had to guess, I'd say power supply. If you can, rig up a meter to measure its output and cause the issue. If the voltage drops drastically in tune with your screen going dark, try to replace with a beefier (higher amperage) one.

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