![knowledge-base-header-bcn3d-logo.png]](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Header/knowledge-base-header-bcn3d-logo.png?height=40&name=knowledge-base-header-bcn3d-logo.png){kind=logo}
Troubleshooting
- How to manually unload filament (Sigma series)
- How to replace the Hotend flat cable (Sigma Series)
- How to change the SD reader (Sigma Series)
- How to change the mainboard (Sigma Series)
- How to check and change the mainboard's fuse (Sigma Series)
- How to change the X endstop (Sigma Series)
- How to change the Bondtech driver (Sigma Series)
- How to change the extruder board (Sigma Series)
- How to change the extruder motor (Sigma Series)
- How to check the flat cable connections (Sigma Series)
- How to change the cooler fan (Sigma series)
- Sigma series Error List
- How to fix layer shifting in the Y axis (Sigma Series)
- How to remove the Z cable cover (Sigma Series)
- How to remove the inner cover (Sigma Series)
- Endstop issues and how to fix them (Sigma Series)
- How to check the operation of the Bondtech extruders (Sigma Series)
- How to fix layer shifting in the X axis (Sigma Series)
- How to check the operation of the cooler fan (Sigma Series)
- How to change the Z endstop (Sigma series)
- How to change the Y endstop (Sigma Series)
- How to replace the X, Y, and Z drivers (Sigma Series)