Question about Sony STR-DE405

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My sony goes out and then there comes 'protected' on the display

When I put it out and on than it works again. Then sometimes after minutes, sometimes after days it goes out and the display blinks 'protected'
What can I do?

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  • 89 Answers

Sounds like its over-heating.

Two things:

1. Unplug and flip upside down and use canned or compressed air and clean it out. Remove chasis if necessary, BUT, do not touch anything with your hands!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! The capacitors inside will hold LLLAAARRRGGGEEE amounts of electricity and can electricute you even while unplugged from an outlet. Just spray it out with the air

If that doesn't work....

2. Place a fan on top of the unit or on the vents. Do your best do keep the device WELL VENTILATED and COOL!

Air flow is key to lifespan of amps.

Posted on Oct 01, 2009

Testimonial: "Thank you, verry clear explanation, till now it helped."

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Posted on Jan 02, 2017

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No response from amp


it sounds like you have a bad ground make sure its on the froame or body and make sure any rust or paint is sanded or scraped off

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