Question about Dell ST2420L 24 inch LCD Monitor

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Problem with power save mode of Dell screen ST2420L

When I shut down the computer, the screen goes into power save mode (HDMI connection to the computer). When I turn the computer on again, the screen does not go out of power save mode and stays black... Any ideas?

Posted by Anonymous on

5 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 53 Answers

SOURCE: Dell E152FPc Monitor powers up, and screen goes blank in 5-10 sec

ok every one there is a fix the are 4 transistor 2sc5707 and 2 transistorfu9024n and i cap 16v1000uf
if you replace these your problem will be fix for a while but to it better then dell replace the 2sc57o07 with radio shack tip3055 they are 15 amp trans instead of the low 8 amp dell uses they fail because the amps at the test for the transistor is more than 8amps all the correct parts are sold in a kit on ebay look up the 2sc5707 but i recommend upgrading to the tip3055 transistors they are a bigger transistor but you can lay them down and they work great. the capicator can be found at radio 35v1000uf is a good replacment make you monitor better because the new parts are stronger then the originals so no more failures after.

Posted on Feb 20, 2009

  • 1 Answer

SOURCE: Dell E177FP monitor won't turn off in power saving mode

I had the same problem and I went to the first button on the monitor to the left(main menu) then with the button to the right (-) I scrolled down to factory reset. I also did the osd setting and I'm not sure what fixed it, but I havn't had the problem sence.

Posted on Feb 28, 2009

skotkolr
  • 558 Answers

SOURCE: I only get power saving mode on my screen then screen goes black

inside the power pack is a pulse IC chip they fail and cause all kinds of havoc also caps can cause issues unaccounted for, I would start at replacement of the IC about 2 dollars on E bay, and replace any bad capacitors you can see, they look domed or are leaking color from the top creases. after that get back with me and we can either proceed or you can rate me fixya, have a great weekend

Posted on Apr 05, 2009

  • 19 Answers

SOURCE: Monitor E172FP only fashes on then turns black.

its a bad solder/heat problem with the power board you need to repalce eaither the board or parts on the board the parts on the board are:

Q743 - FU9024N
Q741 - FU9024N
Q759 - 2SC5707
Q739 - 2SC5707
Q760 - 2SC5707
Q740 - 2SC5707

and part PF751 the black fuse - 3A 125V

i don't promise that this will fix it but its worth a shot

Posted on May 16, 2009

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You could have a corruption in the script or a process that won't stop. Try holding down on the power button until the screen goes dark and all lights go out. That is a hard shut down without saving settings. After it shuts down (finally) power it back up. Hit the F8 key on your keyboard the moment your machine goes to the black screen before it can load windows. That is the safe mode. Move the highlight up to safe mode or safe mode with networking and allow it to continue to boot up. Then, when it's completed the process and windows displays that it is in safe mode, do a normal restart. That should resolve the issue.

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1 Answer

My monitor shuts down after one second.


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 computermag-glass_10x10.gif 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."

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