I flashed me Da Vinci 1.0A to repetier a few weeks ago, and after minimal adjustments I was getting excellent prints in ABS.

I upped my infill to 60% to print the MPCNC. At that point the print failed and the nozzle seemed to be clogged. While I was trying to clean the nozzle (using fine guitar wire, and then a toothpick) the extruder fan stopped and the LCD display went off. There are no obvious disconnects on the printer or fraying.

I can connect to the printer and jog the axes from repeitier, but when I try to heat the extruder I get a M999 error. If I try to heat the bed the printer sounds error beeps over and over.

The LCD is out but I can press the buttons and hear corresponding beeps as I do. I removed the printer shell and the FF cable looks to be in perfect condition.

At this point I’m thinking maybe I crossed the thermistor wires, or the like causing a short.

My questions are:

Would causing a short here make the LCD go out?

What would make the LCD go out?

If it’s a short would there be something on the main board to be fixed? (I’ve read there is a fuse, etc.)

If there is a problem with the main board would I still get the (limited) functionality of the printer that I am getting?

I’ve thought of replacing the thermistor, but it appears that the 1.0a uses a 500K rather than the 100k for both the extruder and the heated bed. Before I get crazy with work arounds I’m hoping one of you can guide me to a simpler fix.

Thanks in advance

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Hi was the printer on when you were playing with it? Only asking as did have repetier on mine but was playing around with the fan and i think the + wire hit the metal pices on the bed then i got the 2 black bars on the screen and only got get the z axle to work x y was frozen up still got it to content to repetier host try to reflash it but no good ended up putting a Arduino mega with ramps 1.4 board to get it working again. If it was on i am guess you have fry the board . Good luck let me know how you go whit it

yes, It was on. I didn’t get black bars, I have no LCD at all. I have been told it is likely one ore more of the zero ohm resistors I probably shorted. At least I hope it’s not the whole mainboard. But then, I just tested them and they all read about 1.4ohms each, so I’m not sure what I’m going to do at this point.

I gave some thought to putting in the ramps/mega. how long have you been running that, and would you recommend it?

I’m not really too keen on taking that on right now but I do already have those parts on order, I was in the middle of printing the MPCNC when I screwed up my Da vinci.

I have had going for about 3 mouths now not had any real issue . Mine was second hand when I got it and never really got it to work when it was stock . But i did notice that I could control it a lot more better than with the stock software. I dont think you can use the CNC board on the printer . If your going to do the Adriuno mega you will need just look at it as a kit forget its a xyz lots of YouTube videos and if you are looking at doing a CNC you should be fine. Good luck with the project