Why did the sound on my HDMI stop working?

I hooked my computer up with an HDMI, and it's been working fine, but yesterday when I switched channels and switched back, a little message popped up saying something along the lines of my HDMI being hooked up to a DVI, so my sound no longer works....

I bought a ps3 hdmi cable(the offical ps3 brand one that comes with a 2.0 usb cable) and when i used it it looks great so i booted up a game and the sound from it isn't working. I've tried pretty much everything. i've made sure that my tv is on hdmi...

I have a Sony Bravia flat screen TV, Direct TV, and a Roku box. I just got the Roku box and have an HDMI cable for that. Once I plugged the HDMI in, the sound worked fine for the Roku box but when I tried to watch Direct TV again there was picture but...

On the tv i am planning to get, there is one HDMI port and then there are two groups of the red and white audio jacks. now the HDMI will be going from my ps3 to my tv and the one of the groups of audio jacks will be used for my surround sound system...

After I visited a trusted site that requested to load a certificate or something like that, my sound started working strangely. One day, it was unable, I fixed it. The other day, the volume was completely down. The other day, it changed the sound playback...

It was working perfectly fine the day before but suddenly its not working anymore. It's a Toshiba Regza HDTV, about 2-3 years old. I tried multiple sources into the tv and none of them worked, so the source isn't the problem. I tried plugging my tv's...

Im trying to figure out how to get sound from my TV when im trying to watch a movie off of my computer when its hooked up to the tv through the HDMI cable? I only get the sound from my computer and thats no a lot of sound. any info would be great I have...

I have a Sharp Aquos lcd tv. It has two hdmi inputs with a samsung dvd player, and a PS3 hooked up. They worked perfectly, then we had a power outage, and the next day the hdmi connections don't work. I've already tried reconfiguring the devices (setting...

The sound on my tv stop just stop working. I tried turning it off and leaving it off over night but that didnt work, I also unplug the cable box for a hour but that didnt work! The sound works for the play station and the wii but not the channels why...