With my computer up and running, the monitor (AOC 2217v) screen goes out black, power switch stays blue,but no image. I have to turn it off and then on again, but it goes out after a few second. if I have an schematic maybe I could solve this problem myself, but I have no such luck yet. so, if you had encounter this problem before, I could use some help.

the problem is not on the monitor your system unit is the problem...maybe the RAM memory,video card or very high resolution try to load in other monitor and down the resolution to 800 X 600..

Check all the pins on both ends of the VGA cable and make sure they are properly seated.
Right now it is not getting the blue video signal.

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm/

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.

Hello,

The picture board on your monitor is bad, since it goes off after few seconds and the power led or button is on, it means the picture board of your monitor has developed fault.

The best thing for you to do now is to take the monitor to a local repairer or service center within your vicinity to help with the replacement of the picture board because the fault is not something you can fix yourself, in order not to complicate issues.

Take care.

You need to fix a capacitor. Take it to a repair shop.

You should set your PC to the monitor native resolution for this monitor: 1440 x 900 @60Hz.
Here is the spec for your monitor: http://www.dealtime.com/xPO-AOC-919Swa1-Black

Here is a link to the manual for your AOC 22" monitor.
When the window opens you will see "pdf downloads" on the right side of the page. Click on your manual and download it.

Hope this helps to unlock it.

http://us.aoc.com/support/manuals_drivers

Hi, I don't think the problem is with your monitor. Your monitor sounds like it's doing exactly what it's supposed to do. The monitor is supposed to turn off if there's no cable attached, which means there's no signal input. When the screen goes black, does the power light stay on and turn orange? or does it go off as well? I would recommend that you lower your screen resolution to 1280x1024 or lower in the Display Properties window, then remove your primary monitor, and connect the monitor to your desktop computer. You should see it light up when connected. The monitor auto-senses when there's a computer attached to the cable and when there's a signal. If it doesn't see a signal, it goes black to save power.

I think it maybe time to buy a new monitor