My monitor does not work at all I have tried another monitor and that works fine

Maybe the switch doesn't support the type of monitor that you are trying to use. Have you tried switching back to the old monitor to see if that one still works?

that means your monitor is working fine, just check your video connection on both ends of the monitor and PC.

maybe your PC has two video cards, try to plug in another video connector

Try to fix the screw of VGA connector,cable connection only.

Does the new monitor work correctly when installed to some other computer (notebook or desktop) ? If it, you have a "dud" that should be replaced, under warranty.

Try changing the data-cable between the monitor and your computer.

Swap monitor for one that works on your machine?
Should be someone you know who would be willing.

Is it new?
If new ask for a swap.

F2 to open bios?

Try to reinstall the drivers for the monitor and see if that works.

http://www.driversdown.com/drivers/ACER-AL2016W-Driver-WindowsXP_68735.shtml

try running the monitor self test ie unplug the video cable of the monitor & then see if u r getting the mukticoloured bars on the screen or not?
if yes then its working fine otherwise the monitor has gone bad.

Hi, Try using another outlet.
Does your AC power cord have any indicator lights which is why you know the power cable works fine?
Base on your assessment, I would say the power supply board on the monitor needs to be replaced.
Thanks,
Mike H.

1.What I need you to test is...When laptop monitor go grey try plug external monitor and see that it work fine or not ??
2.Incase it work fine try to give a little tap behinde the laptop monitor and see that any changes...keep try and harder and see

3.Incase if you gave a hard tap also and its still the same but external monitor work fine then....I think you have problem with your LCD monitor coz there are chips that control the LCD crystal and maybe when it goes hot it behave this way....in this case you can't change the chip...you have to change the LCD.
takecare.

It sounds like the monitor functions properly and your computer functions properly, but the combination causes a problem. Try making sure the screen resolution on your main computer is set to an acceptable resolution for your monitor - AL1916. Try setting it low to 800x600 and move up from there until it doesn't work anymore. You can change the screen resolution from the Display Settings (right click on the desktop and select Display Settings) window.