Unable to change any settings, volume, channel, AV input etc

I HAD VERY SIMILAR PROBLEMS WITH PIONEER VSX 523 UNTIL GOT MEDIA BOX FOR TV SO ALL INPUT/OUTPUT ON AMP WERE HDMI AND NOW SOUNDS AND WORKS BRILLIANTLY

With the HDTV set for an HDMI Input that matches the HDMI Jack that you've connected to the cable HD STB (set-top-box or "converter"), use the cable STB remote to change channels on the STB - not the TV.

You can not change channels of the STB with your TV remote. You may however, be able to program your STB remote to operate your TV. Most will allow you to power the TV on / off; volume up / down / mute; change input (HDMI1 / HDMI2 / ANT / Composite / etc.) and even some of the more complex functions as well. Contact your cable company for more details.

The only digital audio input for this TV will be via the HDMI input. Of course, even with HDMI in, you're only going to get a simple stereo output from the TV. You can use the analog L & R audio inputs for a very similar sound from the TV speakers.

The digital multi-channel audio (Dolby Digital, THX, 5.1, 7.1, etc) encoded in the program should be connected to a suitable multi-channel amplifier with either a TOSLINK (optical), RF (coaxial) or HDMI cable for theatre-like sound. This can be done by (a) cabling from the source (DVD, BluRay Disk, Set Top TV Tuner, etc.) directly to a multi-channel amp and speakers, or (b) from the HDMI output of these devices (DVD, BluRay Disk, Set Top TV Tuner, etc.) into one or both of the TV's HDMI inputs. This will provide only stereo sound output from the TV speakers. You should connect the TV's TOSLINK optical "Digital Output" jack with an optical cable to the amplifier's TOSLINK optical input jack to obtain theatre sound.

To listen to the program shown, you would select the amplifier input assciated with the optical, RF or HDMI input that is connected to the source (DVD, BluRay Disk, Set Top TV Tuner, etc.) if connected directly. If the TV HDMI input(s) are used, they are output to the TV optical output and should be connected to the amplifier optical input. The amp input associated with the optical input should be selected to hear the program with theatre-like sound.

Not sure what unable to connect means..but I will assume you have the correct cable.

First make sure you have plugged the from the HDMI cable from the DVD play into the IN 1 HDMI port on the back of your Onkyo

On the Receiver
Enter the Setup mode
Select INPUT OUTPUT ASSIGN
Next make sure the HDMI monitor out is set to YES on the Receiver
Monitor out
HDMI Monitor - YES

Next you need to assign the HDMI INPUT to DVD
Select INPUT OUTPUT ASSIGN
HDMI INPUT
DVD - IN1
CBL/SAT - IN2

This may be your issue.

Next step would be to verify your television input settings.

Nice receiver!

Best of luck!

the link system is only availible with certain equipment at this time. The exernal devices have to have the proper set up in them to allow this to work,

The audio inputs on the receiver need to be set to receive the Optical signal on the switch you set the ps3 to. ie Game, DVD, AUX. Each switch needs to be set to receive the audio signal coming into it. Usually on the remotes setup feature.

the tv has a configaration that conveys the sets focus on both audio and video performance. full hd resolution of 1920-1080 pixels.
hdmi inputs allow connection of the generation of 1080p sources for the systems which offer 1080p outputs

if your DVD player supports a HDMI cable a single cable is enough for both audio and video channel.

but both your player and TV must support HDMI.

Okay so you have the HDMI cables from both the DVD and the Cable box plugged into the reveiver?

The problem you're describing sounds like a tuner problem. BUT you say that you have the same problem with A-V input too. That's weird!!! Possibly the electronic TV-AV switching circuit is messed up and stuck in the TV (tuner) position. If this is the case you DO have a tuner problem and a switching problem too.