Can not get the sound to work on the monitor and everything is plugged in.

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.

Your monitor is most likely fine. That message is the monitor telling you it's not getting any video signal from the computer.

If you're hearing all the sounds that go with a normal startup (usually a beep from the motherboard, then hard drive activity, finally the normal Windows startup sound through the speakers), and seeing that message, then you may have a monitor problem. You can try another monitor as a test.

The trouble is probably that the computer is turning on, but not actually starting up. This may be due to power supply, memory, processor or motherboard problems. Or one of the drives or expansion cards connected to the motherboard may be keeping the system from starting.

Make sure the memory modules are firmly seated in their sockets, and disconnect everything else but the power supply. If the motherboard, processor and memory are working, the system will start and you'll see something on the monitor. Then you can start reconnecting parts and see when the problem returns.

You may need to load the monitor drivers.

I assume your PC sound is OK.

When you are plugging the green lead in the Moniotr / PC do you hear any noise from the monitor?? if not may be faulty.

Try plugging a friends set of speakers into the back of your PC.

Start> control panel>sound>volume.

Be sure the mute option for microphone is not checked and that the volume slider isn't at its min setting/or muted/

Happy listening.

I assume the monitor has speakers built in . Have you plugged the sound card in to the monitor?

DVI is a hardware interface. It's a type of plug.

Does your monitor have speakers built into it?

On many computers, the output for the sound is very near the output for the monitor. Is it possible that you loosened the wire for the sound when you installed the monitor (plugged it in), or unplugged the sound altogether and plugged it back into the wrong place? The outbound sound hole on most, but not all, computers is green.

All computers have at least two places to plug in sound, most have 3, and the newer machines have 6. If you are unsure which is the correct hole to plug that sound wire into, you can play something on your computer that makes sound for a while (like a song) and move the plug from one to the other until sound is heard.

If you have 6 holes that the sound wire fits, you most likely have software on your computer that pops up and tells you were you have plugged it in.

If the speakers are built into the new monitor, check the monitor for controls and ensure that the volume controls are not all the way down.

All of these solutions are hardware solutions. Now, we have software solutions:

Open the control panel and find Sounds and Audio controls. Open that.

Check to see that nothing has "mute" checked.

Check also to see that the sound levels are high enough to hear something.

Good luck.

check to see if sound is muted in the sound audio control pop up.

At first you should clarify if your GPU or LCD is broken.
Do You have any chance to try another monitor with your Graphicadapter or to try your monitor on a different PC?
Moreover you should try it with a new cable.

The symptom of weird symbols sounds most likely like a overheated or wrong-plugged Graphicadapter

The monitor must plug into the PC as the external speakers did.

plz check sound with speaker if there is sound then u can check or change cable that you are inserted in monitor plug .if it is ok then problem is related with monitor sound ckt plz change ic related with sound section