Dell computer screen black out

Sometime this will happen when the Dell machine is stuck in sleep mode. Press and hold to power button for about 10 seconds. You should see the fan spin just a little this tells you that sleep mode is off. now try starting the computer like normal.

you just need to re-install the Operating System from recovery cd

I have a strong suspicion that you have burned a capacitor or two on the monitor. You will need to bring this in to have it serviced as it will require the monitor to be opened up and new capacitors replaced/resoldered.

The dialog box you are seeing means that the monitor is not receiving a signal from the computer.

check your cable going from the monitor to the computer. if the cable seems ok, hold the power button on your towerr until it turns off, then wait 5 seconds and push the computer power button again.

Cheers

Drain flee power and your PC should work !
Steps to drain flee power:
1. Unplug power cord,
2.Remove Battery.
3.Press and hold power button for 30 seconds.
4.Reconnect the battery and power cord and start your system

Dont forget to say Thanks !

is the cpu running ,, with connection to monitor,, you can try restart,, and go to display properties,, screensaver,, there power button and change the settings,,,

Check the capacitors on your monitors circuit board. If they have opened up at the top, they are fried. Buy new ones, make sure nothing has leaked from the old ones, and replace them.

the resolution set by default when you load your graphics driver is outside the range of your monitors capability.

try starting in safe mode then adjust your resolution to 640 by 480 then restart.
if this works, adjust upwards to 1024 by 768
then up again till the screen blanks.
when it does, dont panic, wait 20 seconds and the settings will restore - you then have the optimum settings for your monitor.

good luck

Vertical section problem

change all caps in vertical sec and replace vertical IC

No, this is typical problem for defective inverter. Mostly screen appears for some seconds and then turn to black. If you are technician, you can use this link :-).
http://www.lcdrepair.us/1702inverter1900x.html