RECEIVER KEEPS SHUTTING OFF

It's clearly detecting an overload or short. Check all speakers and wires for faults and if it still plays up look for an short in the main power amp of the unit.

This is most likely caysed by a sghorted power transistor.

it shuts down and powers up itself or u can power it up in a few secs again ?
if second statement then it may be coolers fault. notebook can shut down if too much heat
try using everest ultimate edition to check temperature in your pc
if higher than 70 buy additional cooler in store

took the memory card out and then turn on the camera and see the result. If its going off again then camera firmware corrupt and u need to visit service center.

I have had the same problem with my new Onkyo HT-S 5305B (A/V Receiver + 5.1 speakers). To solve this, try to follow "Troubleshooting" guide that came with your system. I followed it 2-3 times. In my final attempt, when system was not shutting down but stayed-n with no sound, I played with the setup and tried changing audio adjustment, input, dimension etc. and slowly I was able to get speakers up one after the other. It's working fine now.
However, I am little concerned that why such a high-class Onkyo system failed in less than two days, forcing me to troubleshoot. - Apurva

you need more power

Protection circuit activating. Possibly a shorted amplifier channel or power supply fault. Take it to a Denon repairer

The Pioneer 9700s is a very good sounding unit, if you are talking in home threater space, but your problem sound like the power amplifer section is giving out too HIGH DC voltage therefore ripping the protection circuit. In these newer home threater ammplifers, there are not dc offset voltage adjustment on the circuit brd. All is done by negative feed back. Sorry you ar eout of luck I don,t hinkit is worth fixing. They are not as well make as the older Sa7500, and Sa9800 amplifers of old. There is a good chance that aftera few month something else will go on them. That is why they are so cheap on Ebay, these thraeter receivers.

Good Day;

Sounds like you have a bad green picture tube that has failed. To check this out; remove front speaker grill, remove small panel, you will see three CRT's (pictue tubes) sticking down, remove the little board on the middle tube then restore power. If TV stays on more then likely the CRT is bad but not always the driver on board could also be bad, check voltages.

Good Luck, big IRISH.

look for cold solder joints on primary side of power supply