Question about Harman Kardon AVR 340 Receiver

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No display I am trying to power up my Harmon Kardon AVR 340 amplifier and the blue light will come on for about 10 seconds and it then goes to orange. I never get a display on the monitor.

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Hi and welcome to the site,

Almost always, the described symptoms of the HK AVR340 indicates that it has kicked into auto-protect mode. While this is a power supply action, it is triggered by the logic controller that has sensed a fault and halted the system to prevent further damage.

The only easy user doable try of a fix is to check the speakers and their wires. Ensure that the speakers are within specs, no stray strand touching its opposite, no frayed wires and are connected correctly to the rear of the HK. All others require that the AVR340 be opened up to effect repairs.

Options then are:

  • consider a DIY (do-it-yourself) repair if and only if comfortable working with electronic components & circuitry, use of a DVM/VOM, a soldering iron/station and safe practices with electrically powered devices. Access to a Service Manual or at the very least, a schematic diagram would be a necessity;
  • should you be uncomfortable with a DIY, perhaps your best bet would then be to consult with and/or seek the services of an authorized Service Center (specially if still under some form of extended warranty) or a qualified professional.

Are you considering a DIY?

Good luck and thank you for asking.

Posted on Jul 31, 2010

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Posted on Jan 02, 2017

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