Question about Onkyo TX-R805 Receiver

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Onkyo TX-805 7.1 fails to power up out of standby

Same problem as above. Onkyo tx-8511 wont power up out of standby

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Hi, this can happen during a surge or circuit breaker issue. the stand by mode is also a power protect mode in this situation. im afraid the surge has fried your capacitors on the power board. this will require repair by a skilled tech.

Posted on Feb 24, 2009

  • Michael Masters
    Michael Masters Feb 24, 2009

    Hi again, There is a safe guard that may have saved your receiver. This unit has an A.C. fuse inside that may have absorbed the surge hit. replacing this A.C. fuse may bring it back.

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How to connect Sony dvd player to onkyo TX-8511 receiver


The TX-8511 is an older AV receiver with only composite video inputs. Your DVD player may not provide this type of output as it's not capable of HD video. If your dvd player has a composite output with a Red, White & Yellow set of outputs, that will connect into the Video 2 inputs on the receiver. Your TV will need to connect up to the Video2 or Monitor output. You'll need a set of composite video cables with the red-white & yellow RCA type plugs.

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1 Answer

Onkyo TX-805 7.1 fails to power up out of standby


the unit has sensed an internal fault and shut down or the start up relay has failed in pin #3 inside the unit you will need a service tech to help, if its new the unit is under warranty, the other common cause can be a speaker short in the back, in the wiring or worse at one of the speakers, my new unit had the same problem twice, once for the relay and once because the unit error self test did not like the unit in 6.1 configuration with the left rear surround speaker, holding the power knob down on start up for 10seconds kicks in the auto self diagnostics mode good luck

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There are numerous systems that would be compatible with your system. Consult your dealer where you bought your RCVR..accordianman

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1 Answer

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try powering the unit right down by disconnecting from the mains supply. fire up after 5 mins and see what happens. There is a separate transfomer for the standby supply(small red light) An internal fuse may have failed or the thermal fuse inside the transformer. If fuses blow as sson as you fire up = output transistors hay be short circuit.

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