Question about Sony STR-DE845 Receiver
I have this receiver and my audio is a optic cable to my cable box. When I play a dvd my sound works great my I can't watch cable. There is no sound. It has always worked untill I finished a movie and tried to switch to cable and then there was no sound. Can anyone help?
Posted on Dec 28, 2007
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Jun 07, 2011 | Sony STR-DE845 Receiver
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Apr 11, 2011 | Sony STR-DE845 Receiver
Generally speaking, an amp protects itself from heat, shorts and overloads.
Overloads can be from excessive periods of high output and shorts would be wiring issues or a speaker blowing up.
You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.
If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.
If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced hands-on tech.
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