20 Most Recent Harman Kardon AVR 125 Receiver Questions & Answers

Same problem. C901 on the vertically-mounted input board next to the power supply transformer was burned. Replaced with ceramic cap from RS with same specs. Still did not work. Talked to Jeb, great guy at HK tech support. He suggested that R901 would probably be blown and maybe 902 also. These are flame-proof resistors and do not show damage. Tested with multimeter and Jeb was spot on. Replaced 1w resistors with 5w (all RS had) at same resistance. Works great.

Harman Kardon... | Answered on Jan 23, 2017


Find someone that does TV or audio repair and have them open it up. A cable assembly may have loosened during the MOVE.


Harman Kardon... | Answered on May 27, 2014

try out a external moritor that check the video card or the back ligth lamp

Harman Kardon... | Answered on Jan 25, 2012

sorry nawrock, i cannot help u with this. need to look at what is common on both front channels on a schematic. good luck.

Harman Kardon... | Answered on Nov 16, 2011

You need to add a Pre-Amp to make this functional. it can work, however, it's not really recommended to do this. The impedance levels usually don't quite match and can do harm to the receiver. Pre-Amps range in cost from 50 on up. They are abundant online. Hope this helps.

Harman Kardon... | Answered on Jun 02, 2011

The manual talks about that.

Register and download the manual for free at retrevo.com


Any of the three INPUTS if you're bringing sound IN from the TV or elsewhere; or the lone OUTPUT if you want to send audio to the TV or elsewhere.

If the former, consider sourcing the audio from the REAL original source of the program you're watching, most likely a Cable Box. Less cabling and fewer connections to fail.

Harman Kardon... | Answered on Apr 21, 2011

There is no mention of any fuse in the owners manual (downloadable from the link below)
You could try plugging an external device into the unswitched ac outlet on the rear panel to check if ac power is actually reaching the unit.


Harman Kardon... | Answered on Feb 27, 2011

Hi if there is an optical out on the television i would use that direct to your Harmon Kardon AVR 125, the sound would be in sync with picture, as the source is the same.

Harman Kardon... | Answered on Jan 31, 2011

Actually Home theater sound, is 3D. (Three Dimentional) Your receiver, using surround speakers reproduces 3D sound.
i.e. It is Left to Right, and Front to Rear. Thus it's 3D. If your get a 3D TV, your sound will be just fine because it doesn't come from the set. The sound SOURCE is the DVD player, CD player or Cable Box. If you use digital audio outputs (optical cable or orange colored RCA cables) from these items connected into the Harmon-Kardon, your will get the full Home Theater sound. The Harmon Kardon does not have HDMI inputs however it will not need them for the purposes of sound. Your Receiver is a high quality unit. If you want the thrill of 3D TV, go ahead and get one. After you have set it up, if you then decide you want to go to 7.1 or some other SOUND upgrade, go ahead. One thing you should know, is that there is not a whole lot of audio quality improvement available after 5.1. Unless you have a very large living room. The real quality counts when choosing the speakers and sub woofer that go into the system, not the amount of speakers you have.
I have done a number of high end home theater installations and the experience of hearing the systems (mostly 5.1) has been a thrill for the owner.
I hope this helps you,
Best Regards,

Harman Kardon... | Answered on Jan 20, 2011

Try resetting the system. In standby mode, press and hold the tone button for at least 3 seconds. The message RESET will flash. All turner and system setup info will have to be redone....

Harman Kardon... | Answered on Mar 29, 2010

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