--- title: Printer does not turn on (BCN3D Sigmax) description: "Tools   Make sure that the display does not show a “drive not mounted” message. If it does, the issue may be on the LCD’s microSD card, you can find how to solve this issue on this article: How to upd" --- [Skip to content](https://support.bcn3d.com/knowledge/turn-on-bcn3d-sigmax#main-content) English Show submenu for translations [Contact support](https://support.bcn3d.com/knowledge/kb-tickets/new?hsLang=en) [Customer portal](https://support.bcn3d.com/repair-service?hsLang=en) ![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) - [Default HubSpot Blog](https://blog.bcn3d.com/) Open main navigation Close main navigation - [Default HubSpot Blog](https://blog.bcn3d.com/) - English Show submenu for translations - [Contact support](https://support.bcn3d.com/knowledge/kb-tickets/new) - [Customer portal](https://support.bcn3d.com/repair-service) - [BCN3D forum](https://www.bcn3d.com/community/) [BCN3D forum](https://www.bcn3d.com/community/) Hello. How can we help you? - There are no suggestions because the search field is empty. 1. [Knowledge base - BCN3D](https://support.bcn3d.com/knowledge?hsLang=en) 2. [Sigma + Sigmax](https://support.bcn3d.com/knowledge/sigma-sigmax?hsLang=en) 3. [Troubleshooting](https://support.bcn3d.com/knowledge/sigma-sigmax?hsLang=en#troubleshooting) # Printer does not turn on (BCN3D Sigmax) **Tools** | ![allen-icon](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Tools/allen-icon.png?width=21&name=allen-icon.png) | > 2mm Allen | | --- | --- | | ![phillips-screwdriver-01](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Tools/phillips-screwdriver-01.png?width=90&name=phillips-screwdriver-01.png) | > Phillips screwdriver |   Make sure that the display does not show a “drive not mounted” message. If it does, the issue may be on the LCD’s microSD card, you can find how to solve this issue on this article: [How to update the micro SD files on your LCD (BCN3D Sigmax)](https://support.bcn3d.com/knowledge/update-micro-sd-files-lcd-bcn3d-sigma?hsLang=en) If the LCD is completely black, connect the printer to the computer through the USB port to see if it turns on, if it does not turn on the issue may be on the LCD itself.   **1.** To disassemble the LCD screen turn off the Sigma and unplug the printer's power cable. | ![sigmax-turn-off-1](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/Apagar%20impresora/sigmax-turn-off-1.png?width=335&name=sigmax-turn-off-1.png) | ![sigmax-turn-off-2](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/Apagar%20impresora/sigmax-turn-off-2.png?width=336&name=sigmax-turn-off-2.png) | | --- | --- |   | **2.** Remove the central and left side covers. | ![screw-icon](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Tools/screw-icon.png?width=18&name=screw-icon.png)**x7 M3x8mm** ![screw-icon](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Tools/screw-icon.png?width=18&name=screw-icon.png)**x2 M3.2x9.5mm** | | --- | --- | ![sigmax-inner-cover-1](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/remove%20lcd%20screen/sigmax-inner-cover-1.png?width=600&name=sigmax-inner-cover-1.png)   **3.** Check if the mainboard turns on. To do so, raise the bed and remove the printer’s central cover. If it doesn’t, check that the power supply cable connector is properly connected to the mainboard. ![mainboard-light](https://support.bcn3d.com/hs-fs/hubfs/mainboard-light.png?width=395&name=mainboard-light.png) **4.** Check the cable connections on the On/Off switch are properly connected. | ![conector Cropped](https://support.bcn3d.com/hs-fs/hubfs/conector%20Cropped.png?width=500&name=conector%20Cropped.png) | ![conector-cable Cropped](https://support.bcn3d.com/hs-fs/hubfs/conector-cable%20Cropped.png?width=500&name=conector-cable%20Cropped.png) | | --- | --- | **5.** Check that the power entry module cables are properly connected. ![power-socket](https://support.bcn3d.com/hs-fs/hubfs/power-socket.jpg?width=600&name=power-socket.jpg)   **6.** Check that the power supply cables are properly connected to both power supply. ![cable-connection](https://support.bcn3d.com/hs-fs/hubfs/cable-connection.jpg?width=600&name=cable-connection.jpg) **Conclusions** Make sure that all the screws are properly tightened and that the cables do not disconnect when lightly pulling from them. #### **[Forum community](https://support.bcn3d.com/knowledge/bcn3d-forum-community?hsLang=en) ** Repair didn’t go as planned? Check out our **[forum community](https://support.bcn3d.com/knowledge/bcn3d-forum-community?hsLang=en) **for troubleshooting help.   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](https://support.bcn3d.com/knowledge/maintenance-plan-bcn3d-sigmax?hsLang=en)   ![bcn3d-recycle](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Tools/bcn3d-recycle.png?width=27&name=bcn3d-recycle.png)  Take your e-waste to a certified recycler. [Check how we do it in BCN3D.](https://support.bcn3d.com/knowledge/environment-bcn3d?hsLang=en)   | **Parts** | | Buy these parts | | --- | --- | --- | |   | Power Supply | SKU 10877 |   | --- #### RELATED ARTICLES | | --- | | [![check flat cable eng](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Related%20Articles%20English/check%20flat%20cable%20eng.png?width=600&name=check%20flat%20cable%20eng.png)](https://support.bcn3d.com/knowledge/check-flat-cable-connections-bcn3d-sigmax?hsLang=en) | [![check mainboard fuse eng](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Related%20Articles%20English/check%20mainboard%20fuse%20eng.png?width=600&name=check%20mainboard%20fuse%20eng.png)](https://support.bcn3d.com/knowledge/mainboards-fuse-bcn3d-sigmax?hsLang=en) | | --- | --- |   | **Puedes ayudarnos a mejorar la Knowledge Base de BCN3D.** Si crees que nos estamos olvidando algún paso o encuentras algún error, por favor usa este formulario y háznoslo saber. **[Formulario](https://share.hsforms.com/1uOXJH-ipSDyd6-yucFGDRw3fec5)** :) | | --- | - [Omega](https://support.bcn3d.com/knowledge/omega?hsLang=en#main-content) - [Manuals & Downloads](https://support.bcn3d.com/knowledge/omega?hsLang=en#manuals-downloads) - [First steps](https://support.bcn3d.com/knowledge/omega?hsLang=en#first-steps) - [Maintenance](https://support.bcn3d.com/knowledge/omega?hsLang=en#maintenance) - [Tips](https://support.bcn3d.com/knowledge/omega?hsLang=en#tips) - [Troubleshooting](https://support.bcn3d.com/knowledge/omega?hsLang=en#troubleshooting) - [Epsilon Series](https://support.bcn3d.com/knowledge/epsilon-series?hsLang=en#main-content) - [Manuals & Downloads](https://support.bcn3d.com/knowledge/epsilon-series?hsLang=en#manuals-downloads) - [First steps](https://support.bcn3d.com/knowledge/epsilon-series?hsLang=en#first-steps) - [Maintenance](https://support.bcn3d.com/knowledge/epsilon-series?hsLang=en#maintenance) - [Tips](https://support.bcn3d.com/knowledge/epsilon-series?hsLang=en#tips) - [Troubleshooting](https://support.bcn3d.com/knowledge/epsilon-series?hsLang=en#troubleshooting) - [Sigma Series](https://support.bcn3d.com/knowledge/sigma-series?hsLang=en#main-content) - [Manuals & downloads](https://support.bcn3d.com/knowledge/sigma-series?hsLang=en#manuals-downloads) - [First steps](https://support.bcn3d.com/knowledge/sigma-series?hsLang=en#first-steps) - [Maintenance](https://support.bcn3d.com/knowledge/sigma-series?hsLang=en#maintenance) - [Tips](https://support.bcn3d.com/knowledge/sigma-series?hsLang=en#tips) - [Troubleshooting](https://support.bcn3d.com/knowledge/sigma-series?hsLang=en#troubleshooting) - [Smart Cabinet](https://support.bcn3d.com/knowledge/smart-cabinet?hsLang=en#main-content) - [Manuals & Downloads](https://support.bcn3d.com/knowledge/smart-cabinet?hsLang=en#manuals-downloads) - [First steps](https://support.bcn3d.com/knowledge/smart-cabinet?hsLang=en#first-steps) - [Maintenance](https://support.bcn3d.com/knowledge/smart-cabinet?hsLang=en#maintenance) - [Troubleshooting](https://support.bcn3d.com/knowledge/smart-cabinet?hsLang=en#troubleshooting) - [Filaments](https://support.bcn3d.com/knowledge/filaments?hsLang=en#main-content) - [Tips](https://support.bcn3d.com/knowledge/filaments?hsLang=en#tips) - [PLA](https://support.bcn3d.com/knowledge/filaments?hsLang=en#pla) - [Tough PLA](https://support.bcn3d.com/knowledge/filaments?hsLang=en#tough-pla) - [TPU](https://support.bcn3d.com/knowledge/filaments?hsLang=en#tpu) - [PET-G](https://support.bcn3d.com/knowledge/filaments?hsLang=en#pet-g) - [BVOH](https://support.bcn3d.com/knowledge/filaments?hsLang=en#bvoh) - [PVA](https://support.bcn3d.com/knowledge/filaments?hsLang=en#pva) - [ABS](https://support.bcn3d.com/knowledge/filaments?hsLang=en#abs) - [PP](https://support.bcn3d.com/knowledge/filaments?hsLang=en#pp) - [PA](https://support.bcn3d.com/knowledge/filaments?hsLang=en#pa) - [PAHT CF15](https://support.bcn3d.com/knowledge/filaments?hsLang=en#paht-cf15) - [PP GF30](https://support.bcn3d.com/knowledge/filaments?hsLang=en#pp-gf30) - [PET CF15](https://support.bcn3d.com/knowledge/filaments?hsLang=en#pet-cf15) - [Metal Pack](https://support.bcn3d.com/knowledge/filaments?hsLang=en#metal-pack) - [BCN3D Stratos](https://support.bcn3d.com/knowledge/bcn3d-stratos?hsLang=en) - [BCN3D Cloud](https://support.bcn3d.com/knowledge/bcn3d-cloud?hsLang=en#main-content) - [BCN3D Cloud Teams](https://support.bcn3d.com/knowledge/bcn3d-cloud?hsLang=en#bcn3d-cloud-teams) - [Sigma + Sigmax](https://support.bcn3d.com/knowledge/sigma-sigmax?hsLang=en#main-content) - [Manuals & Downloads](https://support.bcn3d.com/knowledge/sigma-sigmax?hsLang=en#manuals-downloads) - [First steps](https://support.bcn3d.com/knowledge/sigma-sigmax?hsLang=en#first-steps) - [Maintenance](https://support.bcn3d.com/knowledge/sigma-sigmax?hsLang=en#maintenance) - [Tips](https://support.bcn3d.com/knowledge/sigma-sigmax?hsLang=en#tips) - [Troubleshooting](https://support.bcn3d.com/knowledge/sigma-sigmax?hsLang=en#troubleshooting) - [Tips](https://support.bcn3d.com/knowledge/tips?hsLang=en#main-content) - [Design 3D](https://support.bcn3d.com/knowledge/tips?hsLang=en#design-3d) - [3D printer](https://support.bcn3d.com/knowledge/tips?hsLang=en#3d-printer) - [Previous models](https://support.bcn3d.com/knowledge/previous-models?hsLang=en#main-content) - [Manuals & downloads](https://support.bcn3d.com/knowledge/previous-models?hsLang=en#manuals-downloads) - [Maintenance](https://support.bcn3d.com/knowledge/previous-models?hsLang=en#maintenance) - [Default HubSpot Blog](https://blog.bcn3d.com/) [![Chill listening crop-3](https://support.bcn3d.com/hs-fs/hubfs/Logo_200px_horizontal_negro.png?width=100&height=40&name=Logo_200px_horizontal_negro.png "Chill listening crop-3")](https://support.bcn3d.com/knowledge?hsLang=en) Knowledge base Copyright © 2026, BCN3D Headquarters