Blinking standby mode light

The Auto Stand-by turns off the receiver if there is no audio or video signal for 20 minutes when set to On. Thus it shouldn't be blocking the receiver from coming on if it is set to Off. When the USB Power Out on Standby (power to a USB device when the receiver is off) or Network Standby (enable network power on requests from the Onkyo app) are enabled, then you get the hybrid standby mode if the Power Management Auto Stand-by is active (On). There is also an HDMI Standby mode for throughput of an HDMI signal.

What devices do you have connected to the receiver? Try turning on a video or audio source before you turn on the receiver. The other reasons for the unit not to turn on is the protection circuit being engaged. This can happen from overheating or a loose speaker wire touching another wire or the back of the receiver. Usually if the unit has the protection circuit engaged, the display will indicate Amp Diag Mode. After the diagnostic test, the display will indicate if there is a problem (SP wire). If there is nothing on the display after the diagnostic, the receiver should work properly when it receives an audio signal to send to the speakers. If the unit has been overheating, make sure that there is good ventilation around the receiver. Also clean any dust off the unit.

Crutchfield has the manual for the TX-RZ730 on the product page: https://www.crutchfield.com/S-lvaBRQ0O5ib/p_580RZ730/Onkyo-TX-RZ730.html . The current link to the manual is https://pdf.crutchfieldonline.com/ImageBank/v20200223150400/Manuals/580/580RZ730.PDF .

I hope this helps. If you heard an abnormal sound or smelled smoke, then the unit has internal damage. Similarly, if the problem continues, I'd suspect a wiring fault between the internal power supply and the main board of the receiver. The unit needs service or replacement.

Cindy Wells

This could be caused by a direct short circuit on the speaker outputs. Try disconnecting all the speaker connections at the back of the receiver and then power back on. You can also try a factory reset by holding the surround mode + clear button for 3 seconds.

if you have the blinking led problem on your SR4002 receiver, it is in protect / safe mode 1- turn on you receiver2- hold 'S speaker B' + 'ATT' + 'exit' buttons at the same time for 3 seconds3- it should turn back on normally

Sounds as if you may have a bad speaker component that is causing the unit to go into a protection mode to protect the unit from shorted speakers/outputs. Try to unplug the speakers entirely and then turn on the unit...If it still does this and goes into standby with the speakers disconnected then there is a problem probably in the audio amplifier circuit that will need servicing by a technician. If the unit stays on..then I would try to put different speakers on the unit to see if it works..if so, then suspect your speakers...if not , then suspect the receiver

Hello Fixya customer,

Thank you for your question.

The best way to fully isolate the fault is to disconnect all the speaker wires, and verify that there are no strands of wire shorting between the speaker terminals on the rear of the unit.

Turn the volume all the way down, full CCW, and if it goes into shut down with the STBY light blinking then there is a fault in one of the amplifier's.

Thank you for using Fixya, and if I can be of further assistance please ask.

Pop sound shows that some thing went wrong inside TV and most probably any part got busted.
Let me know model number of your Sony TV and does its standby red light blinking? if yes, how many times it blinks between 3 seconds interval.

The receiver is going into "protect" mode. This means that a problem has been detected and the unit shut down to prevent further damage. Without seeing the unit and taking some internal measurements, it is difficult to provide a complete solution. Typically, the output transistors fail which can cause this. There are other possibilities too. I would suggest that you get a detailed repair estimate from a local shop. With that information, we may be able to walk you through the actual repair.

Dan

The color wheel needs replacing. Thats causing the whining and it will also make the lamp light blink.

3 times blink shows lamp cover is removed or not installed properly on TV.
Please take out lamp inside TV and check, seems its broken as you heard loud pop.
Thanks.

how many speakers have you got on to it