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Onkyo tx sr-706 no sound after capacitor repair DSP 1 & 2 reads ????

1/2009 TX SR-706 onkyo serviced HDMI board fails again! I had this receiver's hdmi board replaced at my cost in 7/2010 as onkyo would not cover service as unit was purchased from an online electronics dealer they stated was not a registered onkyo dealer. Too bad I didn't know this ahead of time as when I registered the unit online I found out. That onkyo service repair cost me $375.....I had paid $537.63 back on 1/09 for the TX SR-706 originally. So, here I am 5 years from purchase and 3 years from repair with the same failed HDMI board issue. Something is not fair about this in my opinion. I also have an onkyo TX-SR 603X that is perfect. BTW I love these receivers. I actually have had the delayed video no signal issue for a couple of months....took up to 6 on/off cycles to get the video working. I am an engineer and have read the AVM and HiDef forums for years relating to these issues. Rather than spend another $375 I decided to try to repair the issue myself. Please note that when I opened the unit I discovered that the onkyo service replaced hdmi board had the same problematic capacitors replaced with the same temperature rated and 4 volt inferior caps that had failed the first time! I wore a grounding strap and I replaced 12 100 uf caps with 10v 105c caps, and I jumpered all the 3 leg voltage regulators with 1uf non polarized blue 50v caps going from right base leg to wide top bar. Reconnected everything, went right on with perfect hdmi video handshake like when it was new , but now I have no sound in any mode, including fm tuner. Note that when I try to shift to different sound modes such as all channel stereo, etc, they don't show up on the front panel. Also, the eight boxes on the left panel that show the speakers are empty and the hdmi indicator on the right side is blinking. This was working prior to the repair I just completed. So I checked my EPROM and I got Main: 1.01/ 08620A and DSP 1st and 2nd ??????. Looks like that's my problem......EPROM has lost digital audio program. I've done repairs like this on other A/V equipment before..... Looks like I'm done for I would think that Onkyo would at least extend the warranty when you use their repair service and almost pay what the unit costs in the first place.

Posted by Anonymous on

6 Suggested Answers

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Posted on Jan 02, 2017

  • 14 Answers

SOURCE: Onkyo TX-SR605 Receiver HDMI Issue

How good are the hdmi cables that you are using???

Posted on Dec 13, 2007

  • 2 Answers

SOURCE: Onkyo TX-SR605 conected to Mitsubishi DLP TV

What I think I did and how I fixed it!


All you have to do is to do a factory reset on everything, but I thing mostly on your 605, but I would do it on the TV as well. I think what had happened is after I set everything up for the first time, it worked great. As the days when on I started to play with all of the futures the 605 and the TV had to offer. I was turning them on and off to see what everything did. What I think I did was, I turned on something in the 605 that the TV did not know how to cope with. If I had to guess, I think it is the Lip-sink feature (Spelling?) in the 605.

Anyway disconnect everything, look in your manuals of the TV and the 605 to see how to do the factory reset on both. Then turn your TV on. After it does it’s start up for the first time (again), start connecting the 605.

It has been working great for me after I did this. Do not count on help from the people you bought it from or the people who made it. This stuff is so new they do not really know how to fix it.


Posted on Jan 27, 2008

  • 1 Answer

SOURCE: Amp Protection Mode

from LANCE P: I fixed it. Be sure that all your speaker connections are perfect. No element frays that can arc, no +/- problems, no single barely connected wire. My problem was volume sensitve and I evidently had one + wire that was loose in the back. I corrected it and ran it all day with surround and good volume with no problems. So diligently check ALL YOUR SPEAKER CONNECTIONS, both in the back of the unit and at your speakers

Posted on Mar 31, 2008

SOURCE: No video through HDMI section of Onkyo TX SR-805 receiver

My has problems with losing video on HDMI, component, or svideo, this is a piece of you know what!

Posted on Jul 12, 2008

  • 24 Answers

SOURCE: bose 901 iwht tx-sr 706

You will need to connect the speakers to the front channels as you would with any normal set(Speaker + to amp +, speaker - to amp -, etc) then you connect the special Bose equalizer through a tape monitor loop and always have the monitor loop engaged.

Posted on Dec 29, 2008

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