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Hi Fred, Thank you for reaching out to us and we do apologize for the inconvenience. Please allow us to help you and turn this into a better experience. We appreciate the steps you've gone through to isolate the issue. There are few things that you can check moreover. If “PROTECT” appears on the display panel, the receiver will automatically turn off after a few seconds. Also, there may be an external speaker issue or connection issue that is triggering the protection circuit. If you haven't yet, try following these steps to resolve this issue: - There may be an electrical surge or power failure. Unplug the AC power cord (mains lead) and then plug in the cord again after 30 minutes. - The receiver may be covered and the ventilation holes are blocked. Remove the object covering the ventilation holes of the receiver. - Disconnect all of the speakers and subwoofer. - Check that the speaker wires are tightly twisted on both ends. - Connect the front speaker first, plug in the AC power cord (mains lead) and turn on the receiver. Increase the volume level and operate the receiver for at least 30 minutes until it completely warms up. Then, connect each additional speaker one by one and test each additional speaker until you detect which speaker is causing the protection error. For more information, please check the steps on this link to isolate the issue: https://www.sony.com/electronics/support/audio-components-receivers-amplifiers/str-dh590/articles/00025095 We want to make sure that you’re taken care of. If you need more information or technical assistance with your product, please feel free to contact us and we'll be more than happy to assist you. You may send us an email at [email protected] with the following: Name: Best Buy Username: Model Number: Issue: Telephone Number: We are sorry for the inconvenience and hope to speak to you to resolve this matter. Regards, Jess
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