The Touchscreen is black and won't light up.
- The Touchscreen itself is broken.
- The Controller is broken.
- The Power Module or DC power cable is broken
1. Check whether the light at the back of the Controller is breathing.
- If it breathes regularly, launch Snapmaker Luban, and try to connect your computer with the machine using a USB cable. If Luban has no problem connecting with and controlling the machine, then the Controller is fine. In this case, go to step 2.
- If it's not breathing, then it might be because the Controller, DC power cable, or the Power Module is broken. In this case, go to step 3.
2. Check whether the Touchscreen cable is connected right. Unplug the Touchscreen cable from the
Controller, flip the cable connector 180°, and plug it back in.
- If this doesn't solve the problem, then the Touchscreen is broken. In this case, replacing the Touchscreen might solve the problem.
3. Check if the DC power cable and the Power Module work properly.
- If there is no breathing light at the back of the Controller, and Luban can't control the machine, then it might be because the Controller, DC power cable, or Power Module isn't working properly. In this case, go to step 4.
4. Connect one end of the cable to the Power Module, and turn on the machine. Find a multimeter to measure the voltage of pin 1 and pin 2 (see picture below) at the same time. The normal value should be between 3.0–3.6 V. Then do the same with pin 1 and pin 4. The normal value should be about 22.8–25.2 V.
- If the test values are normal, then the Power Module and the DC power cable are fine, and the Controller is the problem. In this case, replacing the Controller might solve the problem.
- If the values are not normal (pin 1 and pin 4 is 0 V or 3 V, for example), then replacing the Power Module and DC power cable might solve the problem.