How do I reset from the amp protect mode Onkyo receiver TX-SR600?

Hello
When the device stay on STBY it means it is in a protection mode.
means also safe mode so it wont make more damage.
Try this my friend.
1: please check speakers cables.
If you have some knowledge in Electronics
test on the supply board in/out volts and power Amp voltage (Not on the transformer)
check with diagram as shown

Any onkyo AV amp remotes can work well .
I use onkyo TX-SR600 remote to control RZ800.
It works so far so good. A remote for SR807
works well in SR333 also.

I had the same problem with my TX-SR601 receiver.
Solution: I changed the capacitor C766 (100uF/6,3V) on the "DSP and main microprocessor" or "U1" board. This capacitor is responsible to keep the settings in the memory. It is directly next to the SRAM ICs (Q705-706) (type: CY7C1019BV/CV33-15VCT).
Now the receiver works properly again.

All you have to do is get a 3.5mm plug to two RCA plugs lead and plug the 3.5 Jack in the headphone socket of your ipod and the two RCA's into an aux imput and away you go. If you get one of the small docks, that will stop the battery running down, but you don't need one.
By the look of the picture on FixYa it looks the RCA's can go in the front socket under the volume control.

Check the audio amplifier IC maybe are damaged and need to be replaced

there is an internal shorting inside the amp that puts the amp in protect mode also check if the amp comes on after disconnecting the speakers

There's a fre service manual here, you need to join tte site (free)

Onkyo TX SV727 Manual AV Control Receiver HiFi Engine

Have you connected the Subwoofer out to the "Pre-out Subwoofer" on the left bottom corner jack(looking from the back)?

Have you set subwoofer out in the menu(under speaker settings or similar menu you will find all the channels that you have connected and here you should have "YES" for the subwoofer)?

HTH

If bought new return immediately for replacement. The amp section is no good and cannot be reset - needs repair. but you are under WARRANTY - use it.

Audio amplifier IC's damaged you need to change it.Good luck