Originally Posted by billysworld
My 7909 is currently at the service center for a similar issue.
When watching satellite tv, blu ray and or Netflix the volume "drops" off and sounds muffled and muted. However background noises such as explosions, airplanes, car engine noises come through fine. Only speech seems to be affected.
The right sound stage also crackles on/off.
Audyssey is setup on this unit.
The repair center has not been able to reproduce the issue and I'm hoping to point them in the right direction. It is a major headache to reinstall this receiver into the rack.
So my question is, since they replaced the hdmi board how has your 7909 been? Anymore issues with sound?
Didn't think anyone was still reading this post
The repair center found nothing wrong with the 7009 after three weeks of bench testing. After some coaxing and pointing them to this thread they replaced the main HDMI board and upgraded firmware.
After reconnecting and running Audyssey setup the 7009 was a new unit. The issues with low volume and drop offs with the front sound stage were gone.
Forward to present day February 2017
There are times when the right front speaker drops off completely or cuts on and off. In addition the volume drops to a low discernable level. Sounds like its muffled and muttered.
This issue occurs the most when watching satellite tv, for example the 11PM news on channel 4. Interestingly if I watch a program from the dvr I can rewind and the issue occurs at the same points every time.
There are also times where a popping sound can be heard as if the volume is trying to restore itself.
To rectify the issue I crank the volume up to the 60 db range and the sound returns.
No issues when watching blu ray or streaming from the Roku.
I've added a cooling fan that resides on top of the 7009.
One last thing I want to try is to turn off Dynamic Volume. The default is set to off and I enabled it during setup.