AUDIO O/P SOUND CHANGED SUDDENLY

Instead of aux (Blue Connector of PC Sound), try using head phone jack (Green Connector of PC Sound). It if is working fine, uninstall sound driver of your PC, restart PC and install sound driver again. Your problem will be fixed.

To help people who want to help perhaps you could give more detail.
1. Did it ever produce sound, has it suddenly stopped working
2. Have you tried different inputs for example a blu ray or DVD payer or games console
3.have you disturbed the cabling or changed settings?
4. have you tried looking at the audio menu to check nothing has been changed?
5. Have you tried headphones
6. Have you tried feeding the audio to something external?
7. What were the circumstances leading to the fault?

If only one channel is affected it is not a problem usually with the set--it does not know what channel you are on---look in audio menu and make sure if set has SAP it is not on.

Broken audio cable entering the transmitter or audio jack plug.

Power supply plug loose / faulty power supply.

There are several reasons why you could suddenly be getting a crackling noise. My best guess is you have the laptop near some kind of magnetic source - maybe a cell phone? My Boost mobile phone would do this to my speakers. Is this possibly the cause?

re install the mac drivers from mfg web sight

if you cannot reinstall it or it is installed correctly that means that your sound card is in fact broken =(. you will need to replace it. soundcards are generally inexpensive depending on what you will be using it for.

No, the headphone output is designed for 2 speaker output. Just recently I had a customer who had no sound coming from the desktop speakers yet the headphones worked just fine.
I believe that your model has a sound circuit integrated into the motherboard. It may have a “plastic cap” covering the audio ports (next to the USB ports). If you remove the sound card and enable the integrated audio in the BIOS, you can check to see if the sound card is actually the problem.



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Have you even installed the sound drive yet?

The best thing to do is check the status of your speakers and the speaker plug