Onkyo tx-rs605 no power

The 0-83 error indicates a problem with the firmware update.

Try resetting the receiver's BIOS by following these steps2:
Unplug all cables
Un-Power the receiver
Power the receiver
Before the receiver gets into the "Enter for updating" message, press Tone + CBL/SAT + ON/STANDBY. This will show you either the volume numbers or get you into settings of the receiver's speaker configuration.

Press CBL/SAT + ON/STANDBY. This will clear the BIOS and show a "Clear" message on the display. Wait until you hear a couple of clicking sounds for the receiver to turn on and off the power.

TX-NR555 Owner's Manual - Onkyo Product Support (onkyousa.com)

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

If Zones are turned on or, if a mobile device connected to the Front Input is charging (MHL), the HYBRID STANDBY indicator won't light. See the TX NR515 owner's manual at http://filedepot.onkyousa.com/Files/own_manuals/TX-NR515_English.pdf for more info.

see if this link helps you out.
No power on Onkyo TX DS 787 Google Search

i try to repair but still c/n on >.< need to on loan board try repair

That sounds like an internal problem inside the unit

Remove all Wires form speakers
Power on
Push Video1 + StandBy /On
appears Clear on display

I have onkyo tx-ds575 and i need to conect it to my tv and have audio from a LCD flat panel.

The outputs are blown and will require repair.

If the unit will not leave standby I would remove all power, disconnect *all* connections at the back, reconnect to a power source and try powering on. This will eliminate any connection causing the Onkyo to stay in standby due to a short. If it still will not enter power-on mode, you may want to look at the power source (is it properly grounded?), but beyond that the unit probably needs to go back.