Hi, this description usually indicates power supply failure, you can verify this by checking the output voltage of power supply. Cause of the error can be electrolyte capacitors. You can identify them by swelling at the top of the condenser. If you have the technical ability? so there are a few more options for testing. In any case always possible to replace all power supply. Good luck! Let me know if everything worked out, or if you need further guidanc
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