Had my RAMBo repaired (Taz 4) for a blown extruder mosfet last year (out of warranty now). Looks like I’m having the same issue, extruder motor completely stops mid print (manual jogs don’t work as well). Seems to work again after power cycling the printer.
Lulzbot support previously told me I can use the 2nd connector on the electronics case (the one for the duel extruder). I just have to upload a certain firmware.
Does anyone happen to have a link for that or know what to change in the firmware code?
EDIT: Swapped out the Rambo and upgraded the extruder to the hex extruder. Still have the same issues. It may be the power supply fan that went out. Read several posts with the same issue and it was resolved with a new power supply.
EDIT: Replaced the power supply with the new version Lulzbot sent. Working fine so far. Looks like that was the issue