Receiver will power up fine then goes in to protect mode.
I turned my STR-D460Z sony reciever on with my Samsung TV, Sony Surround Sound Speakers, and Samsung DVD player hooked up to it and it worked for over a year but it didn't work this time. The manuel doesn't help, all it says is to eliminate the short then turn it on but it doesn't tell us anything els. I unplugged everything from it and unploughed it then plugged it in and turned it on but it just came on and flashed "protection". We pulled the cover off and ran the cleaner through it gently, put it back together, turned it on with nothing plugged into it and it still flashed and flashes "protection".
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you have speaker wires that are shorting out. unhook all the wires and ohm them out. Find out which one is shorting. I've had this problem before. It's fine until you turn it up, Then the receiver turns off and goes into protect mode. It's just a short in the wiring,.
Try disconnecting all of your speakers, and then turn on you unit. If you have a defective speaker, or a short in your wires, your unit will go into protect mode. If your unit seems ok with the speakers disconnected, then turn unit off, hook up one of the speaker leads and try it. This way you can isolate the problem.......
I have had this problem several times with Sony receivers in the past. The issue may be frustrating but these receivers are idiot proof. It is doing you a favor by tripping and not setting your house on fire as well.
Many things like improper wire crossing or touching due to too much of the insulation stripped off can cause this. Thunder storms and power surges as well have been known do this to Sony receivers.
Unplug the unit and remove the cover. Look for any blown fuses as sometimes this is the problem. Take the fuse to a Radioshack to find new ones. However, it is likely you will need to take it in for repairs. This usually costs around $100. Find a local electronics repair shop in your area ( "TV Reapir in the yellow pages") or call Sony to send it to them.
You might be trying to push it too hard, or you might have a short somewhere. Disconnect everything from the reciever except its power cord and turn it on. If it still goes into protect mode, then try to find a reset switch (not sure if this is on the Sony, some recievers have them). If it's NOT in protect mode, then you had a speaker wire shorting out on the back. Make sure that you don't have any stray wires when you connect the cables on the back of your receiver. It only takes one strand of copper to short out the amp section. If that doesn't work then pull the top cover off and chech the fuses out. One of them might be blown.