Question about NEC MultiSync LCD1830 18.1" LCD Monitor

1 Answer

Monitor not working

When computer is powered on the monitor keeps showing the red blue and green box saying self test and just keeps popping up on the screen and monitor will not come on.

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 4,889 Answers
Re: monitor not working

These messages appear during if the video cable becomes disconnected or
damaged.(most likely you will need to replace it)
Turn off your monitor and reconnect the video cable; then turn on both your computer and the
If your monitor screen remains blank after using the previous procedure, check your video
controller and computer system; your monitor is functioning properly

Posted on Nov 14, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

The monitor will not show a picture the led is flashing green

* If the issue is visible in the monitor STFC (Self-Test Feature Check), the monitor is defective. * If not, the issue is with either the video card driver or the video card.
* Turn off both your PC and monitor * Disconnect the monitor from the PC (either the white DVI or the blue VGA. They should never be connected at the same time to one PC) * Turn the monitor on * The floating Dell red/green/blue/white dialog box should appear on a black background * Check for the issue

Mar 02, 2011 | Dell E173FP 17" LCD Monitor

1 Answer

My monitor is not responding. I have a blank screen and my power led is flashing green, none of the front monitor buttons are responding, not even to turn of power. Cannot access menu as I have blank,...

Hi Cat, You can try removing the data cable of your monitor, the one connecting to the back of the tower/computer. If there are no issues on the monitor, normally you will be getting the power self test which is indicated by three vertical colors on the screen (Red, BLue, Green). If you dont see the power self test, it may be a problem with the monitor. YOu may want to try using a different monitor to isolate issue if available

Oct 27, 2010 | Acer AL1912 19" LCD Monitor

2 Answers

E153PFc Dell monitor: cannot change resolution

Monitor STFC (Self Test Feature Check)
* Turn off the monitor
* Plug the monitor power cord directly into the wall socket to remove any surge protectors or APCs from the troubleshooting equation
* Unplug the monitor video cable from the back of the computer
* Turn on the monitor
* The floating red/green/blue/white dialog box should appear on screen against a black background. What appears?

Jul 17, 2009 | Dell E153FPc 15" TFT LCD Flat Panel...

1 Answer

Dell172fpb 17" monitor

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.


Oct 26, 2008 | Dell E171FPb 17" Flat Panel LCD Monitor

1 Answer

EMachines E19T5W Flat Panel Monitor - keeps blinking red, green, blue white lines

On the monitor below the screen has these fine pink and green lines blinking across the screen all the time on my laptop. Can you tell me how to fix it or solve this problem?

Aug 12, 2008 | E-Machines 19" Widescreen Flat Panel TFT...

2 Answers

Monitor trouble shooting

what would i do for my monitor that went blank

Apr 07, 2008 | Dell E173FPb 17" TFT LCD Monitor

1 Answer

Problem with the monitor


The three boxes represent the built-in diagnostics of the monitor. The letters G is green, B is blue and R is for red, the 3 color guns of the picture tube of your monitor. The words "Self Test" indicates that it is in diagnostic mode since it has powered up, it is also then expecting a video signal from a source to be coming in; the display "Check Your PC And Signal Cable" indicates that it is not receiving any video signal from the source which is your PC or more specifically the PC's video card; and the display "Monitor Working" indicates that the diagnostic has determined that nothing is wrong with itself and therefore it has got to be your PC that is in question. The intermittent appearance of the boxes is when the diagnostics restarts itself and eventually finds the same problem.

To determine if it is the PC or the monitor, use another PC (even a laptop with matching VGA output) and try it with your Compaq monitor, see it it will work or alternately, try a different monitor to connect to your PC. The outcome will determine which is at fault.

If you have determined/verified that it is indeed the PC, you should focus on the video/graphics card. In some PC models/versions, the graphics/video is built-in to the motherboard and you should check the memory since this is shared. The only way is to replace either.

Hope that this be of some help/idea. Pls post back how things worked out or should you need additional information.

Good luck and kind regards.

Dec 07, 2007 | Compaq FS7550 17" CRT Monitor

2 Answers

Dell P1110

Hi, The part where you see some color bars and blinking green led is what we call MONITOR SELF TEST. A diagnostic pattern consisting of four colors (red, green, blue and white) appears, and the LED flashes slowly. this happens when signal cable from the monitor is disconnected from the tower and leaving the power chord for the monitor plugged in. If the monitor works properly on a different computer. then its a problem with the computer's video card sending out signal. im 85% sure that its a problem with your video card.

Oct 02, 2007 | Dell UltraScan P1110 21" CRT Monitor

Not finding what you are looking for?
NEC MultiSync LCD1830 18.1" LCD Monitor Logo

Related Topics:

170 people viewed this question

Ask a Question

Usually answered in minutes!

Top NEC Computer Monitors Experts

Brian Sullivan
Brian Sullivan

Level 3 Expert

27725 Answers

William Miller
William Miller

Level 3 Expert

8795 Answers


Level 3 Expert

2598 Answers

Are you a NEC Computer Monitor Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides