Dell Monitor (e171fpb) is black

Reset the factory default: http://support.dell.com/support/edocs/monitors/E171FPB/En/controls.htm#AccessingtheMenu_System
If that doesn't work and it's not under warranty a baseball bat will relieve some stress at least.

Check the power supply DC filter caps, burnt parts, cold solder joints, etc.
If you are going to DIY repair, please read below and look at my album of failed Dell monitors to get some ideas.
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, blown fuses, poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed Dell monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://en.wikipedia.org/wiki/Capacitor_plague

http://www.badcaps.net
Replacement board: http://www.lcdrepair.us/e171fpb-power.html
http://www.lcdrepair.us/e171fpb-inverter.html

Common failure in the Dell are shorted transistors or bad caps in the inverter ccircuits, bad solder joints, bad caps in power supply. I would try it on another PC first, if it still does not work, you will have to open it up. Please look through my pictures of failed Dell moniotrs to get some ideas.
http://s807.photobucket.com/home/budm/allalbums

Replacement board: http://www.lcdrepair.us/e171fpb-power.html
Please post back what you find.

Have you unplugged the power cord to the LCD? Let it sit for a minute, then try it. ALWAYS buy a UPS and plug any computer devices into it. Doesn't have to be big, a $50 unit will protect it from dangerous voltage surges.

Hello,

Your backlight inverter inside the monitor is out. If you are comfortable soldering you can repair it yourself. We have a step by step repair guide on our web site at: www.ccl-la.com/LCDrepair5.htm

I hope this helps, If so please rate my solution.

Buddy
Corporate Computer

Self-Test Feature Check (STFC) Your monitor provides a self-test feature that allows you to check whether your monitor is functioning properly. If your monitor and computer are properly connected but the monitor screen remains dark, run the monitor self-test by performing the following steps:

1. Turn off both your computer and the monitor.
2. Unplug the video cable from the back of the computer. To ensure proper Self-Test operation, remove Analog (blue connector) cables from the back of computer.
3. Turn on the monitor. The floating 'Dell - self-test Feature Check' dialog box should appear on-screen (against a black background) if the monitor cannot sense a video signal and is working correctly. While in self-test mode, the power LED remains green and the self-test pattern will scroll through the screen continually.
   
4. Turn off your monitor and reconnect the video cable; then turn on both your computer and the monitor.

If your monitor screen remains blank after you use the previous procedure, check your video controller and computer system; your monitor is functioning properly.

Thanks
proton

The driver tabs between the LCD panel and it's controller board have failed.
These are very fragile and not repairable for anything in the cost effective range.
Best option is to either find a new panel to replace it, or get a new monitor.

This may not because of LCD.Have you try to use other monitor to confirm that you PC is OK?

Try first unplugging the monitor and the computer from the wall for 12 to 24 hours. If this does not work, hook up another monitor to the puter to see if the problems with the puter or the monitor.