How do i turn the mute off on my pioneer deh7700mp

There should be a button labeled ATT that is your mute button. Att is short for attenuation.

Maybe you have MUTING selected. Turn the volume knob up or toggle the Mute control on the remote.

If it defaults to muting on power up find the manual and search it for a default volume setting.

It happened to me today and it passed after a while when i was arriving home. Try to reset it by taking the power source off for a couple of minutes then try again.
Don't forget about your system definitions, it will be restored to default.

I have had the same problem, since there is no "mute" button on the receiver panel. My power cord on the receiver was plugged into my cable box and I was told this is not correct. I unplugged the receiver from the cable box and plugged it into my power surge protector and no more "mute"!!! Hope this helps.

My Pioneer Super Tuner 3 D was working just fine. The face plate was removed by accident while it was operating. Once it was reinstalled the displays all still work but there is no audio any longer.

check in front of your receiver and check the button wheres say mute press that button and
see if work or buy universal remote.

why has my pioneer saying mute

Are you sure it's not the TV telling you that it's muted? I went down the tubes on that one myself.

The receiver's Mute can be defeated by just rotating the volume knob upward. Ditto with TV's.

You have to isolate yellow-black cabel. This cabel was in contact with earth and it was the reason, why you have Mute on the display.

You have a flashing "mute" on the display?...accordianman