No sound from TV just unhooked everything but xfinity & tv can't get audio from TV

You need to either have the TV repaired or you can replace it.

iLive ITB382B ...

Best thing to do is call Xfinity @ 1-888-COMCAST

DVD Codes (I don't think so)
2267

Audio Codes
4012 4019

xfinity iLive ITB382B remote codes (Naah... 3475


Comcast Official Site Cable TV Internet and Phone Service

XFINITY by Comcast Official Customer Site Email Watch TV Online

iLive Brand Electronics

http://uverse.com/

I don't know if this helps, but I had the same problem in reverse. Great picture - no audio. I finally unplugged the TV and all devices connected to it (DVD player, cable box, etc.) waited 3 minutes and plug everything in. The audio was restored.

Replace or have replaced the Audio board in the set----a lot of them fail.

Hello
You want to connect your TV with an external audio device, and want to hear sound from it, I assuses, and posts this solution.
There is audio out sockets at the back side of the TV, very near to S-Video socket. Marked audio "L" & "R". These two sockets are audio out socketsfrom TV to connect any external audio amp. Just use an audio cable to connect these sockets, to 'Audio IN' of the amp socket. Switch ON both the devices. You can hear the audio of your TV programmes by the amp you conneccted with.
The picture of the AV cable is given here. Take red and White colourd connections to connect the TV with amp. Left the Yello coloured pins free. It is meant for video.

Hello
Check whether 'mute' function is On. If it is ON, normally a embelm of speaker with a red cross over it will be displayed on the secreen with most of the TVs. You haven't given any details of your tV, brand name, model number etc:- so, i can oly give you general flault description. If mute is OFF, and still there is no sound output from your TV, check its speaker first. If speake is OK, check the set for it audio output, by connecting it with an external amp, by connecting the audio out rCA socet at the mack of the tv, to the audio 'in' of the amp. If there is audio out from the TV, you can heare audio through amp. If there is no audio from amp also, make sure that the sound fliter circuit inside your tV is faulty. If there is sound through amp, and no sound comes by the loudspeaker of the Tv, make sure that the audiou output section circuit inside your tV has the fault; provided speaker is good. OK.

audio lag is normal for many TV's.

it sounds as if you have a connection unhooked or loose somewhere. Double check all audio and video cables are secure and in the correct position. If that doesn't work try troubleshooting by trying a different tv or removing all connections from tv and xbox and re-hooking everything back up.

First off it's always best to start from scratch when it comes to home audio. LoL. Many times I've been in this situation.
So with everything disconnected. You should have your HDMI, COMPONENT, RCA(R,W,Y)
HDMI and COMPONENT are the exact same thing and in all preference COMPONENT is far better thand HDMI for the pure fact that each wire is in it's own casing and insualted to avoid feedback from the other wires.
Anyways, with everything disconnected we begin
From you Cable/satellite box- Run your HDMI cable from you cable box to your HDMI 1 input on your tv.(If your speakers were to work on your tv you would automaticaly get sound and picture)
That should be all that you should be running from you cable box. Now that we have one thing running we go to the next thing.
From your TV run your audio out (RCA Red/White) to your amp. Usually your preference but more than likely your TV IN on your amp.
With your amp now set on TV, you should automatically get sound from your tv. and if your running an HD cable box even though your only running RED/WHITE to your amp, you will still be receiving Digital sound.
Most new amps Should have a digital input and if your running and 1080iUp this one RCA plugin will give you dolby digital sound from your dvd player to your amp. Then running a video rca up to your tv, will give you the picture, while the digital out on your dvd player to your amp will give you dolby digital sound.

It's a basic simple step to get sound. Like a continuing current. So just as long as you have your cable to -- tv -- home theatre. Everything should work. Otherwise I would go and check your cables and make sure they are not faulty.
I hope this confusing walkthrough helps.

Sounds like you have a bad speaker,or at the most the audio amp needs changing. Get old speaker out of another tv or stereo.