I recently purchased a Dell u2518d monitor, after about half an hour it makes a musical sound and turns off. about 1 hour later I can turn it...

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Hi Lynch,

Thank you for waiting!

Once the Moitor turns off. It cannot be turned ON right away?

May I know where it is bought and how old it is?

Is the LCD plugged directly to a wall socket or into a hub or power surge protector?

Is it connected to a computer?

A computer has a power off feature that may render the LCD off.

Does the turning off happen while you are using the computer or only when it is idle?

When the Monitor turns it self off.

No power light showing on the LCd power indicator? or the light just changes?

It is also possible that it is the computer that's shutting down.

When the Monitor goes off.

Do you recognize seeing no signal or something like this before the monitor fully turns off?

I see,

How often does this happen?

May I suggest, Lets wait for it to happen today.

When it happen, I would suggest restarting the computer and lets check if it will make the LCD to turn back on rightaway.

Shutting doesn the computer when the screen goes off is Holding down the computer's POWER button.

I see,

How often does this happen?

May I suggest, Lets wait for it to happen today.

When it happen, I would suggest restarting the computer and lets check if it will make the LCD to turn back on rightaway.

Shutting down the computer when the screen goes off is Holding down the computer's POWER button.

Also Is there a number I can reach you at just in case?

You know where your computer's power button is right?

Its on the computer tower

Ok lets wait until the problem re occur today.

Once it did. Try holding down the power button on your computer tower. this will restart the computer and lets see if it will also be able to power back the monitor right away.

this will give us an idea if it is the LCD powering off or it was the computer thats causing this.

is there a number I can reach you at?

Ok With this old monitor.

The turning off display is not happening at all?

I see,

Well the Tv model does not have that feature that can cause the problem you are describing.

Given that this old monitor is working ok, This isolates that your computer is working ok too.

I would say it is a problem with the Monitor itself. Something internal on the monitor.

If this Monitor is new you should still be able to return it for replacement or either a refund. did you bought it from amazon or the like?

I see. Yes it will be replaced, You will have to contact amazon and report the issue and they will let you know how to send it back.