NO SOUND OUT OF RECIEVER, TURN VOLUME TO MAX AND CAN HARDLY HEAR ANYTHING

turn up the volume on both devices

Some devices just suck at audio. I have a Lenovo laptop that does the same. Bad onboard speakers require external speakers to produce suitable sound level.

increase the volume to max level .close yourself to TV speaker and listen.if could not hear anything,just turn it off and turn on if you could not hear at least pop sound from the speaker,you will have to replace new speaker.if you are able to hear Buzz noise or very low sound ,sound circuit has to be repaired.

Go to Tools...Settings....Volume....check your Master / Nav/Media volume control there

thebuzzer of your phone is defected, replace itand replace also the earpiece 

If the volume buttons work when using the Radio, then the buttons on the Remote are fine.
Now if the volume on your TV is set to MAX and you can barely hear it.
The issue lies with your TV.. ()
Now if I understand correctly or if I am to assume you are using a Reviever.
If the reciever is used for all volumes... If this is the case.
I also assume the volume on the TV Speakers is set to off
Therefore when you use the Radio/DVD the volume control is using the Reciever volume.
and when you switch to TV it uses the TV volume thus the TV volume is not gonna work as well.
2 scenarios
1 The TV volume even at max is not giving you enough power to get the low receiver volume
2 the Receiver volume is at max and barely audible.. if this is the case just manualy adjust your TV volume to get it to a decent sound level.

Hard to explain but I know the 2 issues can be fixed.

i have the same problem with a onkyo tx ds494

sound mute problem.
are you with electronic knowledge to fix this?
i can help.
nuwan.