How to disassemble the LCD screen (BCN3D Sigmax)

In this article you will learn how to remove the LCD screen safely


Fine spatula or Boxcutter
2mm Allen
Socket driver 5.5 mm

Firmware fixes may be released from time to time, and sometimes the LCD screen files need to be updated. Here's a link that will show you how to update the interface files. How to update the LCD files


Either it's from this or just because the screen broke and needs replacement, you'll have to disassemble the screen of your Sigmax. Here's how:

1. Remove the central and the right side black covers. screw-iconx6 M3x8mm

screw-iconx2 sheet metal

sigmax-inner-cover-1 sigmax-inner-cover-2


Tip: To remove the right side cover, you should remove the right bottom bowden. Press the coupling collet, disconnect the filament sensor and pull down the lower bowden:

_MG_2333 _MG_2332



2. Apply pressure on the rear of the LCD while detaching it with a fine spatula or a boxcutter. After applying pressure, you’ll get enough space to introduce the tool between the printer’s frame and the LCD.


Warning! Do NOT slide the tool in the left side. Just on the upper, lower and the right side areas


3. Disconnect the flat cable from the LCD.


4. Disconnect the flat cable from the adapter board.


Notice: The flat cable has to be connected with the silver pins facing upwards at both ends.


5. Disconnect the multi-cable from the adapter board.


Notice: The multi-cable connection orientation: The white cable should be out of the connector and the smooth face of the connector should be facing upwards. 


6. To reassemble the screen, follow the same steps in reverse order.



If you still experience issues with your screen functionality, it is likely that the interface files have to be updated. Here's how to do this: Update micro-SD files BCN3D Sigmax


It's important to keep your printer in good shape to make the most out of it. In this chart, you can find a list of the extruder maintenance procedures and how frequently these should be done. Maintenance Plan

Forum community 

Repair didn’t go as planned? Check out our forum community for troubleshooting help.


bcn3d-recycle  Take your e-waste to a certified recycler. Check how we do it in BCN3D.


Parts   Buy these parts
lcd-component BCN3D Sigma/Sigmax Touchsceen SKU 11060


check flat cable eng


update lcd sigmax eng



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