Question about Harman Kardon AVR 2550 Receiver

2 Answers

No sound from speakers and display panel blinks all the time.


I bought my avr 2550 second hand. The whole display panel blinks constantly (this surely cannot be right) and there is no 'test signal' sound in speakers either before setting up the analogue CD input or afterwards. I have tried my two existing stereo speakers in every stereo dolby mode. The result is the same.. blinking display and no sound. (I have already reset to factory defaults before all this)

Have I bought a piece of junk or is there a reason for these symtoms? Am I doing something wrong? This was supposed to be a present for my girlfriend and I am despairing here.



Posted by on

  • james beam Dec 06, 2007

    Hi Audiophile,

    Thank you for your help

    I already tried that with a different speaker set. Alas not the problem.
    And according to the manual the 'on' button should glow red when in protection mode, as opposed to yellow or green.

    Thanks for taking the trouble to help.


  • james beam Dec 07, 2007

    Hi Tony,

    Thanks very much for your input.

    I've done this reset properly twice, but no joy.

    It looks bad, doesn't it? I got a pile of junk :-(

    Thanks for taking the trouble to help me.



2 Answers

More info from James - HK repair says it is a power supply problem which I must say I can hardly believe. Let's see if they are right. - price for repair 150 euros.


Posted on Jan 28, 2008

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There could be a short somewhere and the stereo is protecting itself. Try connection to a different pair of speakers.

Posted on Dec 04, 2007

  • audiophile Dec 06, 2007


    Alas, I checked my manual when I got home ( I have an AVR220) and saw the same thing when in protection mode - no blinking panel, just the power button. I do have one more idea you might want to try that you may already have tried. But here goes (this from your user manual)

    unplug the unit from

    the AC wall outlet and wait at least three minutes.

    After the pause, reconnect the AC power

    cord and check the unit’s operation. If the system

    still malfunctions, a system reset may clear the


    To clear the AVR 2550’s entire system memory

    including tuner presets, output level settings,

    delay times and speaker configuration data, first

    put the unit in Standby by pressing the System

    Power Control
    button 2. Next, press the

    Tone Mode

    The unit will turn on automatically and display

    the RESET message in the Main

    Information Display
    M. Note that once you

    have cleared the memory in this manner, it is necessary

    to re-establish all system configuration

    settings and tuner presets.

    : Resetting the processor will erase any

    configuration settings you have made for speakers,

    output levels, surround modes, digital input

    assignments as well as the tuner presets. After a

    reset the unit will be returned to the factory presets,

    and all settings for these items must be


    If the system is still operating incorrectly, there

    may have been an electronic discharge or severe

    AC line interference that has corrupted the memory

    or microprocessor.

    If these steps do not solve the problem, consult

    an authorized Harman Kardon service depot.

    since you bought it second hand, do you have the manual? It can be found on Hamans website here:

    One more thing to check is that you have the right voltage at the wall for your unit. I don't know where you bought it from, but is this a European or US unit?

    After these questions, I think you're gonna have to try a service place.




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