Firstly ensure that the 'mute' has not been accidently engaged.
Have you tried connecting other speakers to the same output and cables? If the sound now works, the problem is with the speakers (providing all amplifier settings are correct and wiring is correct). It would be highly unusual to have a problem with both speakers or two sets of cables. Alternatively connect the problem cables and speakers to an alternative source. If they work on an alternative, you are looking at an amp issue.
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There is a difference between SUB and LFE. In 5.1 mode, the LFE is the ".1" channel. It will output bass only when audio information signal is addressed to this channel. In stereo mode, depending of the receiver setting, it can output normal bass when front speakers cannot handle low frequency. In setup menu, you'll probably have to set your Front speakers as "Small" to make the sub channel taking the relay in low frequencies. There also can be many other reasons for your problem but this might be the solution. Good luck!
Zone 2 Setup on the RX-V773 using the ZONE2/PRESENCE Extra Speakers
The RX-V773 extra speaker terminals can power one set of speakers for Zone 2 or Presence speakers. If the extra speaker terminals are utilized then the RX-V773 cannot be set for Bi Amp (Surround Back/BI-AMP terminals).
Setting the Extra Speaker Terminals
Note: The RX-V773 remote control will be used to access the On Screen Menu of receiver.
1. Press the On Screen button on the remote control to enter the On Screen Menu.
2. The On Screen display should be displayed on the TV/Monitor.
3. Press the Arrow Down button on the remote until Setup comes up in the screen.
4. Press the Enter Button on the remote control.
5. The Setup Menu will come up across the TV/Monitor screen.
6. Use the Arrow Left & Right buttons on the remote to navigate to Speaker.
7. Press the Arrow Down button on the remote to select Manual Setup.
8. Press the Enter Button on the remote control to enter Speaker Manual Setup menu.
9. Speaker Manual Setup menu with Power Amp Assign highlighted will come up.
10. Press the Enter Button on the remote control to enter Power Amp Assign menu.
11. Speaker Manual Setup, Power Amp Assign menu will come up with Basic highlighted.
12. Press the Arrow Down button on the remote to select 7ch+1ZONE.
13. Press the Enter button on the remote to select 7ch+1ZONE.
14. Press the On Screen button to exit the on screen menu.
To control Zone 2 using the RX-V773 remote, the switch at the upper left side (above the BD/DVD Scene button) of the remote must be set to Zone 2. To see the operations on the front of the Yamaha receiver you must press the Zone Control button on the front of the receiver.
Note: Only analog signals can be sent to Zone 2. If you want to output the sound from Zone 2, connect an external component to USB Thumb drive, USB iPhone/iPod, Network, AV 5-6 or Audio 1-2 by analog connection. For AM/FM radio the antennas must be attached.
First of all, the speakers are part of a scam. How good can they be?
Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.
Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.
You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.
If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.
If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'nekkid'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.
Check for loose speaker connections at the speaker as another possible root cause for intermittent shutdown.
With what signal did you try? Maybe your signal source (DVD/TV or radio) didn't contain any sounds for the center channel. Go to the Setup menu, Speaker setup / Manual setup and find there item called "Test tone". It will output a test tone to each speaker individually (you will see on LCD which speaker is being tested at each moment). If you will hear a sound from the center now, there is no issue and center is working fine, just your source didn't contain any sound for the center.
If it doesn't work, then either you have faulty cable, faulty speaker or faulty center output of the receiver. - Try connecting the center speaker to different output of receiver (this will test if speaker is OK). - Try connecting working LEFT speaker to left output with CENTER cable (this will test if cable is OK). - Try connecting working LEFT speaker with working cable to the CENTER output (this will test the output of receiver if OK - but use the Test Tone from Setup).
Yes, sounds like your DSP chip has an issue. Not an inexpensive repair if that's the culpret. Around 400-500 to replace the chip. It's an awesome receiver and worth 300-400 in repair, however, a 3800 or 1800 can be had for 600-800 depending where you look. If you need more help, post a comment and I can help you some more.
is it pl;uged direct in wall must nbe on a nice hi end break surge proably got zapped transisters in it best to try to replace it u can try to un plug it from that outlet few min then back in anther one