No sound on pc connection

Here is the manual it will tell in there.
Sony BRAVIA KDL 40XBR2 Operating Instructions Manual Sony BRAVIA KDL 40XBR2 Quick Setup Manual

Hook up a computer to it. The tv could have an hdmi connector or monitor connector (check the back of the television to see which type of connectors you have available) so just plug a cable in from your pc to the tv.

For sound, a simple computer cable plugs into the headphone jack of the computer to the back of the television. If you have a PC, you may have a series of connectors for stereo surround sound systems (like a sound card). I use a simple jack that plugs into the headphone jack (stereo speaker jack) and also plugs into the pc audio in port on the tv. Now I just select the input (pc) from the sony menu and select the option for sound input and voila. As long as the pc is connected to the internet, your tv is your new monitor.

I would contact Sony customer service on the phone with the model number to see if this is a known issue or they have an answer--takes time but may be the best way.

A short fix is to unplug the hdmi cable and shut down the tv compleetly, then get the tv on and plug it in, the tv see the new connection and reset the value's for sound

You did okay but the phono sockets are not for Computer/TV use. Phono sockets should be checked int the manual on why they're there. If you have connected the Bravia to your computer, using the appropriate cable, then you should also purchase or request from the retailer where you purchased the TV a cable that has stereo phono plugs and, you didn't say what size phono sockets they are but I presume they are 3.5 mm. So, if the TV has 3.5 mm sockets, you purchase a cable with stereo 3.5 mm plugs. This is adequate for the stereo wav sound coming from the computer and going into the TV. Remember, having 2 Phono inputs on the TV doesn't mean anything. The TV could have a number of video inputs too, ATD AVT, AV, COMPONENT1, COMPONENT2, HDMI1, HDMI2, HDMI3, etc. each have it's respective sound inputs for AV, S-VIDEO, DVD, Blue-Ray, etc. But for the computer there may be a different type of socket for it's sound inputs, normally it is the old phono sockets. Seek help from the retailer or else you could cook the circuitry of the TV's sound system.

that is the simplest way. please rate, thanks and have a good day

COULD BE A BAD HDMI CABLE,,ALSO TRY CONVERSION IN THE SETUP MENU ,,IT MGHT FIX THE COLORS AND THE LINES

Adjust ur t.v sound cable

how do i hook up hdmi cables to cable Sony KDL Bravia LCD HDTV

Have you tried to hook up your DVD player directly to the surround sound system? If you direct the sound through the TV, it has to pass several circuits and the quality will be lover. Just connect it right away to your sound system. :-)