No sound coming from monitor - Norcent Technologies LM-762 17" Monitor

you need to plug a 3.5mm jack to 3.5mm jack audio lead between the pc and monitor to get sound, the reason it doesnt come with a sound driver is because you dont need one for the monitor

Firstly,

You need to check if the green cable from the computer tower is blugged into the back of the monitor (The cable looks the same at both the ends) this is for the output to come through the monitor.

If that is plugged in and if not working, Try a headphone on the tower and check if the sound is coming from the headphone, If yes, You will have to adjust the volume on the monitor or the speaker of the monitor might have gone bad. If there is no sound coming in, Then the problem is with the tower and not the monitor.

The problem may stem from not having the monitor's speaker system if it has one, hooked up to the output of the sound card on the computer.

Also, if it has an adjustment for volume, make sure it's not turned down to zero volume, and also make sure it isn't set on mute, if it has such a setting.

Most monitors do not have sound on them and many computers require external computer speakers in lieu of sound coming out of a monitor.

It may still have been damaged internally.

connect it to an avr

First off is your monitor has any speakers on it or capable off producing any sound? Not all monitors comes with speakers attached to it.

You need to connect the speaker wire coming from the monitor to your PS3 if you want the sound to come out of the monitor speaker. Normally, you need an adapter for this.

sound does not come from the monitor it comes from the computer. try hooking your speakers up there

when u turn off the system sound comes from motherboard not from monitor if there is showing any speakers in monitor

Check your leads, chances are it's a faulty/dodgy lead coming from your macbook to the system.