If your scanner is not turning on, then the first thing you should do is check to make sure the power supply is connected properly and that it has power. If the power supply and connections seem to be in order, then you should try unplugging and plugging back in the scanner to reset it. Additionally, if the power supply is connected and your scanner still won’t turn on, then you should check the power switch on the device itself and make sure it is in the “on” position.
If none of these steps have been successful, then it is possible that the power supply has failed or is malfunctioning. To determine this, you can try using a different power supply with your scanner to see if it turns on. If the device successfully powers on with a different power supply, then it is likely the issue was with the original power supply.
You may also want to check any user manual or documentation that came with your scanner for troubleshooting instructions. As many power issues can be due to a faulty power source, you should also inspect the wall outlet to make sure it is providing an adequate and steady source of power. You can test this by plugging a working device into the same outlet as your scanner.
If you have tried all of these steps and your scanner still does not turn on, then you may have to seek professional help. It is possible that the device has sustained internal damage or malfunctioned in some way. In order to properly diagnose and resolve the issue, it is recommended that you take the scanner to a technician who can assess the situation and take appropriate action.