20 Most Recent Sony STR-DB870 Receiver Questions & Answers


Generally speaking, an amp attempts to PROTECT itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; 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 and competent hands-on tech.

Sony STR-DB870... | Answered on Jul 12, 2011


i have the same problam nd i can slove it so what can i do.sony sucks

Sony STR-DB870... | Answered on Nov 28, 2009


If the power of the Receiver is ON, press Power to turn OFF the power. Then, hold down the MODE + button and press the Power button together.
S.F Intialize appears in the display and all sound fields are reset at once.

Sony STR-DB870... | Answered on Sep 22, 2009


Audio amplifiers IC´s damaged you need to change it

Sony STR-DB870... | Answered on Nov 05, 2008


Hi have Sony STR-AV 970 not getting any sound from receiver panel lights up, and the FM
Station is up and running but no sound from either A/B speakers as well as the phones

Sony Audio... | Answered on Jan 21, 2020


if all connected correctly check see if fuses inside or outputs could be blown

Sony Audio... | Answered on Dec 18, 2019

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