If your scanner won’t turn on, the first thing to do is to check that the power source is working correctly. Check if the power cord is plugged in securely and if the power switch is turned on. If the power source is functioning correctly, the next thing to look at is the power supply of the scanner itself. Make sure that the power cable is properly connected to the scanner.
If the power connection is secure and the power switch is in the “on” position, but the scanner still won’t turn on, it could be a sign that the power supply unit is faulty. In this case, you will need to replace it with a new one. If you have access to a spare power supply unit, try substituting it for the original one and see if the scanner works.
If the problem persists and the scanner still won’t turn on, it could be due to a faulty internal electrical connection. In this instance, you will need to open up the scanner to gain access to the internal components. Before doing so, make sure you unplug the power cord and any other cables from the scanner. Carefully inspect the internal wires and connections to ensure they are all secure and in good condition. If any of the connections are loose or damaged, use a soldering iron to repair them.
If there is no sign of a loose or broken electrical connection, the issue could be due to a malfunctioning circuit board or other internal component within the scanner. Your only option in this situation is to take the scanner to an authorized technician or electronics repair shop to be diagnosed and repaired.
Finally, if none of the above solutions resolve the issue and the scanner still won’t turn on, it might be that the scanner has simply reached the end of its lifespan. In this case, your only option is to purchase a new scanner altogether.