After working trouble free for two years, it now shuts itself off after about 10 seconds. I've unplugged it as suggested by the manual, but no change. I've not changed any connections and have had no power surges or lightning that I know of.
WOW this worked.. Hold down the ABCDE and the preset tuning right arrow and then hit power.. It puts it into a diagnostic mode, but it stays on.. I just rerouted my video to not use the receiver and the audio works perfectly now.
This problem appears to be remote related. When I removed all the batteries out of the remote control, I powered my 5790 back on. The unit stayed on for the rest of the night. My guess is, the remote is somehow emitting the signal to to go back to stand-by. This could possibly be due to the batteries getting weak. Or the remote could have some other problems.
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These have two issues that I always check. Check and see if your regulated voltages are all coming up . With thecover off go to the right side ,the side away from the power in cord, and check the coonector where you will see several different voltages listed. Make sure you are getting strong readings for the 12volt and 5 volt lines. Don't worry about the 3.3 volt line. I don't see that fail much. Other issue are capacitors in output circuit starting to fail. Vallues like 47uf are common. Larry's Electronics.
1-first try to keep good ventilation around it and confirm that the air flow in and out is completely free from any blocking thing. 2-clean it by air blower. 3-if you use remote control to power it keep it far away and all other remotes also. 4-disconnect all your speakers---- and try to test the amp one by one.until you find the bad one and change it-----if all above not working you must send it to service center near you.
Was there any source playing through the amp when your kid turned on the system?mabye the cd or dvd.If so the speakers may be blowen,to find out put a finger each side of the dome on the bass driver and press gentley,if you hear a rough sound a little like sandpaper or if the cone is stuck you have blowen sprakers,if not let the amp stay off for a couple of hours it should reset.Ps system lock is in your amp menu at the end of the setup list,but this is to lock your settings.
A good habit to get into is to turn system to mimamum when not in use.
hope this helps.