The indicator light does not light up after the printer is powered on. What is the reason?
There are many reasons why the indicator light does not light up after the printer is powered on. First, check whether the AC voltage input is normal, and you can find out by checking the power signal line. Then check whether the fuse of the printer power board is blown; if it is blown, replace the fuse. If the new fuse is blown out again, disconnect the device related to the 35 V voltage and check if there is any problem with the plug-in. Check whether the output voltage of the power supply board is normal. If not, repair the circuit board.