Question about Onkyo TX-SR674 Receiver

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It will turn on and after a few seconds it shuts off and the standby button flashes

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Is the subwoofer self-powered (signal fed by RCA cables) or is it wired into the Speaker Outputs? If the latter, take it out of the mix and see what happens. In either case, is there a subwoofer-designated output or are you borrowing from the main channels?

And check the ever present Tape Monitor switch on older equipment. If it's in the wrong position you'll possibly lose all sound but it could also have an oxidized connection in its 'normal' position, which could make one channel crackly or dead.

On old equipment it is wise to TURN THE POWER OFF and manually operate all controls fully throughout their ranges and move all switches and buttons on and off repeatedly to clean oxide. Also disconnect/reconnect every RCA cable using a twisting motion to clean them


Could be a short in the speaker wires or one of the speakers. Or it could be an internal short in the receiver. You're going to have to do some debugging to narrow it down.

Try disconnecting everything but the front left and right speakers and make sure these two speaker wires are intact (no damage like crushing or frayed wires) with clean connections at the speaker and the receiver end. If you are able to play the receiver like this with just the front two speakers connected for more than an hour, using music (use "5 channel stereo" mode to make sure you are sending a signal to all channels) then add in one speaker at a time: add the center, wait an hour with music playing through it, add the left rear speaker, wait an hour with music playing, add the right rear speaker, etc., then finally the subwoofer.

If the system shuts down after you add any of these specific channels then you've narrowed it down to the speaker wire for that channel, the speaker itself or that amplifier channel. To narrow it down further, try using a DIFFERENT WIRE and a DIFFERENT SPEAKER for the "bad channel" - if the receiver shuts down after adding the center channel, then substitute one of the rear channel speakers (and a new speaker cable) for the center channel and see if this works. If it shuts down again, then you can be pretty sure it's the amplifier/receiver at fault.

If it's the amp, then your best bet is probably to ship it to the Onkyo shop for repair unless you have a good local shop. Onkyo will send an estimate before performing the work.

But first inspect the speaker wires closely, make sure there is no damage to the wires and make sure you have clean connections on both the receiver and speaker ends with no stray strands of wire that may be rubbing against each other either on the speaker or receiver side.
Thanks for contacting Fixya

Posted on Jun 23, 2009


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