My onkyo HT RC330 will not power up at all. Have had problems past couple of months with starting it but if you played around with swith it would start. Now nothing
Audio Players & Recorders - Onkyo - Ht-rc330 5.1-channel Home Theater Receiver
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Answers & Comments
Try resetting the AV receiver To reset the AV receiver to its factory defaults, turn it on and, while holding down VCR/DVR, press 8 ON/STANDBY. "Clear" will appear on the display and the AV receiver will enter Standby mode.
It is possible that the protection circuitry has been activated. Remove the power cord from the wall.. Disconnect all speaker cables and input sources, and then leave the AV receiver with its power cord disconnected for 1 hour. After that, reconnect only the power cord and set the volume to maximum. If the AV receiver stays on, set then the volume to minimum, disconnect the power cord, and reconnect your speakers and input sources. If the AV receiver turns off when you set the volume to maximum, disconnect the power cord, and contact your dealer.
If the standby light is lit it and the unit will not boot it is most likely that the protection circuit has been activated. If there is no standby light then check the fuses. These units check that the power supplies are operating near specification. If a capacitor or resistor in the circuit, or a broken solder connection the unit will shut down. Because of the temperature the thermal cycling around the power supplies a broken solder joint can occur. This will make for an intermittent operation.
Hope this helps.
Failed resistor or capacitor
Sorry for the confusion trace the power 110 volt power circuit to a small transformer that provides the standby power for a processor and the power on relay. From this small transformer there will by a full bridge rectifier a large electrolytic capacitor. the voltage then will be regulated down to 5 volts dc for the processor circuit. Look for a failed capacitor or resistor.
Hope this helps