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Unplug power. Unplug VGA cable. Remove back of monitor. (four small Philips headed screws along the bottom rear. Remove screws attaching Monitor to it's base. Carefully, lean the screen away from back of case. Gently unplug 25 pin cable from the screen. Connect AC power. Screen should power on Gray to White. Ble light comes on Blue.Flickers then changes to Amber. Reconnect VGA cable. Monitor should work. Close up the monitor in reverse order to opening it. If these steps don't solve your monitor, consider replacing as cost of repairs may shock you.
The problem with your lcd monitor is that the picture board of your lcd monitor is faulty that is why it power on for one second goes gray and finally black with only sound.
Since the power led button is on and it still give sound but no display, it means the picture board of your monitor is bad.
All you need to do is to take the lcd monitor to any local repairer or any service center within your vicinity to help with the replacement of the picture board because the fault is not something you can fix all alone in other to complicate issue.
Please disconnect the monitor from the PC and if still the monitor is blank then monitor is defective because when you disconnect the monitor from the pc you should see a message on the screen about signal like no signal etc..
Have you tried hooking up an external moniter? If so do you have video on that moniter? If you do have video on the external moniter then you most likely have a bad inverter or a bad lcd panel.I would replace the inverter first because it's not very expensive.If that doesn't work then you can replace the lcd panelAnd if that doesn't work you have problems at the system board level.
Take the post (power on self test) disconnect vga cable and connect power cable if monitor shows no signal check signal cable massage then monitor is ok fault is in cpu. open it and clean the dust
by vaccum cleaner you will get the display again
Have you checked your video card or adapter?
Check the settings on the monitor itself.
If you didn't find the problem go into system properties (windows logo + pause)/hardware/device manager. Expand monitor/right click and see if your new monitor is listed. Is there a yellow or red symbol next to it? This would mean a problem, then right click symbol/properties and error will be shown.
Could be a memory issue.
Don't forget to try a "working monitor". This will narrow it down a bit.
This monitor has "back lights" that are essentially like flourescent lights. These are high voltage lights and can easily fail. since you are getting some light initially, I would suspect a defective part that heats up a bit right away and then fails. I would try to replace the entire backlight board. This is the small board on the side (usually).
I have the same problem. It seems like a virus to me, but my anti-virus doesn't find anything. I went to the main menu on the moniter and changed the display time to five seconds and locked the OSD display. Now all the appears is a smaller box showing a lock which goes out in five seconds. It is still annoying, but less intrusive then before. Hopefully, some one will determine a permanent fix for this problem.