How to Fix Your FDM Printer Not Turning On

When it comes to maintaining your 3d printer, if you encounter the issue of the printer not turning on, don't panic. This article will guide you on how to fix your printer that won't turn on. The problem could be due to a wrong voltage on the power supply unit or a blown fuse. However, in serious cases, it may also be caused by a damaged PSUs or a broken motherboard. Let's continue to troubleshoot the device and fix it.

1. Blown Fuse

ChecK the fuse

Check the 3D printer fuse.

In most cases, the fuse can be found on the power supply board, which is typically located near the power cord's point of entry into the printer. Then you need to unplug your printer, open the cover to get the fuse and see whether it is burned out. If it is blown, replace it with a new fuse.

2. Wrong Voltage on the Power Supply Unit

ChecK the PSU

Check the voltage rating.

Before turning on your printer, it's crucial to ensure that the input voltage of your device matches the local voltage rating to prevent any damage or potential safety hazards. You can adjust the voltage by the selector switch that is usually located on the back of the printer.

3. Power Supply Unit Failure

Troubleshooting Power Supply Issues

Check the power indicator and the cooling fan.

When you turn on the power switch, observe whether the power indicator light is on or use your hand to feel whether the power supply fan at the bottom is spinning. If not, it indicates that the power supply is not working.

Watch the video tutorial below to learn how to detect and replace the PSU.

4. Motherboard Failure

Check the motherboard

Step 1: Check the motherboard indicator.

When powering on, observe whether there is a solid red light on the motherboard. If there isn't, it means that your motherboard is broken.

Check the motherboard

Step 2: Use a multimeter to test the motherboard.

Use a multimeter to measure the power output voltage of the motherboard, but be careful to work with it, as improper use can be dangerous. Take Anycubic Kobra Neo as an example, if the motherboard's voltage is around 24V, then it is normal. If there is no stable signal, it may indicate that the motherboard is faulty. It's important to note that the voltage of each machine's motherboard may be different, so it's recommended to consult with the machine's manufacturer and refer to the provided data for accurate information.

Final Thought

If you have inspected both the PSU and motherboard and are still unable to resolve your issue, you may need to seek professional assistance. If your 3d printer is purchased from Anycubic, they offer one-on-one after-sales support. Therefore take pictures or record a video of your troubleshooting results and provide them to the after-sales engineer.