Center speaker problem with Yamaha Rx-V671

I recently bought a Yamaha RX-V671.
I have connected my 4 speakers and sub woofer in a 5.1 set up.
I have choosen in the menu for the basic 5.1 set up.
I have used the YPAO room correction and calibration system and test tone set up but it won't recognise my center speaker.

To check the speaker I have connected it to another speaker output : no problem speaker works fine.
Wiring is fine.

What can be wrong?
Thanks for helping.

Hi,

Sorry miss typed.
I ment 5 speakers +Subwoofer.
Center speaker is connected to Yamaha but no sound.
Tried also the test tone : No sound.
All other speakers are fine.

I have looked through the manual.
Did not find any rest of Microprocessor.
However I can do a system reset and change everything to standard settings as it originally came from the shop.
Is this something similar?

Hi JBWIII

Thanks for your advice.
I have done both, the init reset and the power button reset.
In the meanwhile also upgraded to latest firmware.

Unfortunately still no sound through the center speaker.
I switched again the center speaker to the surround speaker connection and the speaker works well.
I have connected the surround speaker to the centre speaker connevtion: No sound.
It's obvious that something is wrong witht he output connection.
Do I need to connect kind of a different speaker?
It's so strange why there is no sound????
I have no clue anymore.

Maybe go back to the shop for a repair??