E19T5W monitor doesn't stay on once power button is depressed

Change the power button

check the power saving mode in ur camera.

Make sure the VGA cable is properly inserted to your pc and monitor

Native resolution is 1440 X 900

It is Windows 10.
I have reverted my machine back to Windows 8.1 and its working perfectly.
As long as you haven't had Windows 10 on your machine for 30 days you can revert back to Windows 8.1.
First of all open Settings and click Update and Recovery

Now in Update and Recovery window click on Recovery option. This will open a list of 3 options on the right hand side. You need to look for "Go back to a previous version of Windows" option. To start the process, click Get Started button under this option. It will ask you to plug in your charger before allowing you to continue.
Make sure your battery is fully charged, because before you press the get started button you need to place the cursor over the button and plug in the charger.
Once the screen goes black press the keypad which should then click the button.
Wait a few seconds and then unplug the charger.
All being well the process will now continue without the charger plugged in.
Once you get to the restart screen it should be safe to plug in the charger and you should then still have a screen you can see.
Hope this helps.

There is a couple of possibilities and things to eliminate.
Your monitor is acting like it's not getting a signal. First make sure your video cable is plugged in and tightly connected with the screws fully torqued down. Test the video card by wiggling the connected cord to see if the monitor comes on even temporarily. Try opening the case and re-seating the video card.
If you can get the monitor to stay on long enough go into the control panel and the properties page and make sure you screen saver or power management for energy savings is not set to zero.
If it's new you may have to go the your control panels add remove components and un-install the video card then re-install the driver again. Windows is famous for this requirement.
If you are using this as a second monitor connected to a laptop you will have to hit the corresponding function key on the top row of your keypad, F4 or ?...., to open the port to avail the signal.
On a mechanical level at the monitor depress the Menu button and try a few sizing adjustments to bring the picture back to shape.
Cable - HDMI, USB, VGA ? You may need an adapter to get the signal VGA to HDMI etc.
We need more information but try these things to start.

• New Monitor
• 2nd Monitor for laptop
• PC or Mac
• Type Cable
• What happened when it quit working
• Has it ever worked.

Let us know how we can help further.
TF

check the power supply and rem or proccesor

Well, it certainly is related. This is OSD (On Screen Display) for adjustment, activated by those pushbuttons.
Did you try to completely unplug the power cable from the monitor for a minute and then reattaching it?
One of those pushbuttons may have got stuck in a depressed position, check if all of them click properly when pressed; sweet drinks spilled and dried off can make a button stick, and sometimes the plastic itself may develop enough friction for a button to stay in a depressed position.

If all the buttons work freely, the monitor may need professional servicing.

if u r using vista sure check the shutdown button.

or press once power button it automatically shutdowns

or hold power button until it shut down

when u close the door it only standby..

Do you mean the computer is sutting down but on the monitor showes different colors if so you might have a problem in the system you might have to reinstall you OS if the computer does shut down but the monitor stays on and flashes different colors you have to shut the monitor down manually with the power button on the monitor.