Though you have not given us the make and model number of that I receiver if it is turning off when you power it up and turn the volume up this usually indicates a problem with the internal amplifier it most likely is damaged
SOURCE: Onkyo TX-SR500 loosing settings
Turning any receiver off will erase the settings - there is no backup battery (Onkyo uses Battery Free Memory Backup) and the length of time depends on the capacitor charge. Why not just leave the receiver plugged in? Stand-by mode uses a negligible amount of power - enough to keep the capacitors charged and the LED on the front panel on.
SOURCE: My Onkyo Receiver TX 601 is turning itself off
Adjust bass control to half position then feed loud signal,if it shut off adjust the bass contol to zero position,if it shut off again the defect is in the over load protection circuit it is already sensetive to loud signal.you may call the nearest audio amplifier technician on you.
Hope it may help you,
SOURCE: Onkyo TX-SR705 Muting Problem
if what Dark_Orbit said does not work try doing a master reset by ressing and holding the dvr/vcr button and stand by button simultaneously. This would erase all your assignments so you would need to reassign all your sources hooked up to your onkyo.
SOURCE: Onkyo tx 906 amp
1) I bought the same Onkyo model from goodwill a couple years ago and it had the same problem. The solution is simple: Get yourself some Deoxit D5. This is a spray that will clean out all the oxidation in the volume pot. To do this you'll need to remove the cover of the receiver. Deoxit can be bought at guitar shops, or if you know a musician they might be willing to do it for you.
2) User manual is available for download, for free. Google "Onkyo tx-906 receiver manual".
SOURCE: Onkyo 705 receiver shuts off at higher volumes
I had this same problem and it turned out to be a twisted kink in the speaker wire. Run a sound check to each speaker separately (from your receiver menu) and turn each one up until the receiver shuts off. Check the wire to the speaker that caused it to shut off and make sure the +- ends are not touching each other at either end, and that there are no twists or kinks along the way.
To do the reset you need to turn the receiver on, then on the front panel of the receiver press and hold the "VCR/DVR" button while doing that press the "STANDBY/ON" button. You will see the word "Clear" in the display screen and the receiver will go into standby mode. PLEASE UNDERSTAND THAT YOU WILL LOSE ALL YOUR AUDIO & VIDEO ASSIGNMENTS ON THE RECEIVER PLUS YOU WILL LOSE ALL YOUR SPEAKER CONFIGURATIONS, SPEAKER DISTANCE AND ALL LEVEL CALIBRATION SETTINGS. YOU WILL ALSO LOSE ANY PROGRAMMED RADIO STATIONS IN MEMORY. Once the receiver goes into standby mode turn it back on and go thru the setup menu for all custom settings, Thanks, JT
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