maintenance methods
It is caused by static electricity or low indoor temperature. Turn off the power, wait 5 minutes to restart and try again; You can wipe the touch screen with a wet towel and press it again; Use a hair dryer to raise the temperature around the screen and try again. If these methods are not useful, it may be due to the damage of the touch screen, the need to replace a new touch screen, in the replacement of the best contact professional personnel to deal with, do not repair themselves.
You can check if the switch on the back of the machine is turned on. If you turn it on, there's no power. You can take off the back cover of the machine and test with an electric pen whether the wire is broken somewhere. If there is no problem with the line, the internal computer board is broken, and a circuit board of the same model can be replaced.
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If a part of the failure, is the film itself in the wire break, no power failure.
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If the whole thing fails, it may be that there is a problem with the driving board of the entire nanomembrane.