My monitor says "no signal detected" Acer x223w then goes black.

Have you verified that the problem is indeed your monitor and not the video card on your PC? i would start by connecting the monitor to a laptop or another PC to verify that the same issue occurs no matter what the source. Once you've verified that, you're likely dealing with a monitor that requires repair or replacement. Hopefully it's under warranty. Hope this helps a bit.

The backlight controller has failed. It can be repaired or replaced.

User manual: http://www.retrevo.com/support/Acer-X223W-Monitors-manual/id/23224ci553/t/2/

That is normal condition, yellow = no video signal from PC since PC is off or PC in standby mode.

yes start the computer then keep pressed the key F8 untill the display comes then hightlight the option last good known configuration and select the problem will be solved

make sure your cables are tight. make sure you have the correct input selected on your monitor. swap your monitor on the pc with one from a freind that works. this rules out your graphics card and the pc. if all of these are correct you probably have a bad video input on the monitor. you may need it repaired.

uninstall the driver from ur display in the device manager, u shud be able to do this thru safe mode. it seems the lcd driver is not compatible with thw m/bord

I have a dual monitor system, both are the x223w. Same problem but only on the second monitor. Backlight shuts off.On/off light stays blue. I have to turn off the monitor and turn it back on. I returned it and Acer could not find any problem so I got it back. No problem for awhile and now a few times over the past couple days. Not good...

it happened may b due to inproper power supply.So check the monitor data cable & other connections also.

TRY NOT USING THE GRAPHICS CARD AND SEE IF IT WORKS THEN. IF SO I WOULD INSTALL THE DRIVERS AND THEN INSTALL THE GRAPHICS CARD.

MY LCD 22 ACER MONITOR GOES O BLACK AND I CAN'T SEE THE MENU