I'm not getting a picture. When I push a button on the monitor it says, "In power save mode, press any key on keyboard or move mouse". Neither one of those things work.

Check all your video cables and check your keyboard and mouse cables. If everything is ok, reboot computer.

BTW - What color is the power indicator?

Hello,

the message Analog input in power save mode means that your monitor is not getting a signal from your computer.

Maybe you moved the video cable while reconnecting your keyboard? check both ends of your video cable.

If you have a DVI cable, then your monitor has to be switched to digial input.

I hope this helps.

The monitor has failed, it is almost always cheaper to replace it than fix it.

Either you move your mouse, or hit a key from the keyboard. In some cases is needed to press the power button from the pc tower.

In case of a problem or clarification, don't hesitate to post.

Thanks and regards
Please kindly rate this solution
Stelios

open control panel choose power options and you can turn it off

Dell monitors automatically go into power-save mode after a preset amount of time when the computer is inactive. The Dell monitor will go completely black, instead of showing a screensaver. This doesn't mean that your Dell computer has shut down. Instead, this allows your monitor to essentially turn off until it's needed again. You can change how long it is before the Dell monitor goes into power-save mode by changing your display settings.

1. Step 1 Press any key on your keyboard or move your mouse. Either will turn off power-save mode. Alternately, you can press the power button on your Dell computer tower or laptop.
   
2. Step 2 Press any key a second time if the monitor goes from power-save to stand-by mode. Stand-by mode allows the screensaver to appear.
   
3. Step 3 Enter your user name and password into the login prompt if your computer requires a login. Press "Enter" to begin using your Dell computer.
   
4. Step 4 Change the display settings on your Dell monitor to prevent your monitor from going into power-save mode prematurely. Right-click anywhere on your desktop and choose "Properties." Click the "Screensaver" tab and press "Power." Beside "Turn off Monitor," choose a time amount from the drop-down list and press "Apply."
   

can you start it in safe mode

The monitor is not receiving signal from the computer. Is the power light on on the computer? If so - press and hold power button on computer until the power light goes off, then press again to restart. If the computer starts and you still have no picture it is most likely a video card or motherboard problem.

Try hitting the space bar on the keyboard. Does the mouse work normally?

Sounds like an issue with a memory card or pci card not properly in place. Try opening up the sytem, then make sure each card is properly inputted in it's slot. This may cause the the monitor to show power saving mode especially if the memory is not properly placed.
Thanks