Question about Harman Kardon AVR 55 Receiver

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AVR55 switches to the standby mode Automatically.

After the receiver has been on for approx. 5 minutes or less it switches to standby and orange is backlighting the power switch. I have checked all of the cables in back and all are tight.  I recently took 13 days vacation and unplugged the power strip before I left.  It was working as advertised before this.  I returned and pluged it in and now it wont stay on.  I read the manuel and it said that the processor may have loaded wrong and to unplug it for 3 minutes and try to repower the system.  I did and no joy.  The receiver does not ever feel hot or for that matter warm.  We primarily use it for movies with digital surround.

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Re: AVR55 switches to the standby mode Automatically.

Mine did the same thing and it was a faulty fuse that was the problem. The cover to the receiver comes off with a small phillips head screwdriver and there are small glass fuses inside it. Remove them one by one, due to different amperages, and check for dis-coloration on or in the glass. Be sure to do this one fuse at a time because the fuses are different rates and need to be replaced in the same spot. If the fuse looks burnt or dis-colored replace it and that may fix the problem.

Posted on Jan 11, 2009

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After turning ON the power/standby switch, the unit(receiver) display comes ON (green light) then after approx.4-5 seconds the display goes OFF and the unit defaults back to the standby mode (red light). I...

Is the red light flashing at first?
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The unit fails to turn on when 
STANDBY/ON is pressed, or set in 
the standby mode suddenly soon 
after the power has been turned on. 
The power cord is not plugged in or the 
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on the rear panel is not fully set to the 
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Set the switch fully to the upper or 
lower end when the unit is in the 
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