If you are capable of checking the supply then good enough , but still refer a technician , logic bord inside the printer needs to be checked (if your supply cord or adapter is ok) , power controlling chips mounted on the logic board needs to be checked and you should contact the repair centres
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If the printer is dead - no power- no LED lighting at all, and the power cord is OK, then look at the power supply section for a defect. A fuse could be blown, or some component failure. Note- if a fuse is blown, this is usually due a component failure, and the exact problem must be located.
If you have some technical skills, a VOM or digital voltmeter, you might be able to pinpoint the problem. A circuit diagram would be helpful also.
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