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I run the computer lab at Discovery School. One of our monitors keeps changing colors every second. Blue red green..... and so on. Please help right away.

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This usually happens when it is not receiving a signal from your computer.
Make sure the VGA cable is plugged into the monitor and PC correctly, try it with a cable from another monitor if you can disconnect the cable, or try that monitor on a different PC.

Posted on Sep 30, 2010

  • Roy
    Roy Oct 17, 2010

    Thanks very much for the bad feedback, the answer i gave is the answer to the question you asked. It may not have solved your problem, but it was the right answer

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2 Answers

Screen keeps flashing green-blue-red


The manual for the monitor can be found here (
Mitsubishi DiamondPoint V50LCD User Manual ) The specific Red Green Blue cycle isn't noted.
:
  1. I'd start with toggling on the on screen set-up display. if that comes up and is legible, then you know that the screen is working.
  2. What is your video set up to push to the V50? If it's not a supported resolution, the display may respond this way. try downgrading it something like VGA (640x480) and see if that works. (The max resolution shown in the manual is 1024 x 768, so don't go higher than that. It's also 24 bit color (8 bits each for R,G,B, so don't try to push 32 bit color to it)>
  3. Set the output to your primary monitor to 1024 x 768, thousands of colors. Make sure the monitor sees it OK. Now you know the first monitor and cable are OK. Now switch the cable to the V50 monitor. Do you get a signal now? Then the display works. Try putting your primary display on the second cable. Does it pick up anything now? No. Maybe a bad cable.
  4. You can try swapping the cable going to the V50 to go from your primary monitor output port on the computer to your primary monitor. if the primary monitor works OK, then the cable is good.
  5. Depending on the computer system you're on, make sure that you at least have a generic monitor driver installed for the V50 output. Ideally, get the driver for the monitor You can get the driver here (
Mitsubishi Monitor drivers ) amongst other places.

Good luck!

Nov 11, 2015 | Mitsubishi 15" Diamondpoint V50lcd-Bk Lcd...

1 Answer

I have an HP7540 monitor that I need to be able to change red, blue and green colors on thru the menu


I hope you know how to enter and navigate through the OSD (On-Screen Display) menu of your monitor.
Enter the menu and navigate to 'Color' menu.
Under that select 'User'.
Now you can select either Red, Green or Blue.
After selecting a color it can be increased or decreased.
Press Exit button to go back, select the next color and set it to your liking.

Sep 08, 2011 | HP Compaq FS7600 17" CRT Monitor

1 Answer

Hello, My name is Diane. I've had my flat screen Acer monitor for 14 months and all of a sudden my monitor has no red, orange or pink color. My screen colors are green, blue and yellow. What is the...


hello Diane, actually yellow is mixed red and green.
I thing you should check your cbf cable first (VGA cable).
Or if you have pattern test, use it to make sure which color has lost.
Change VGA cable may can solve it.
If any problem, please let me know.
Thanks and good luck.

Mar 27, 2011 | Computers & Internet

1 Answer

My screen is green i was going to change monters didn't work so i put it back and it turn green.help please.


Red, Green, and Blue are the colors sent from your computer to the monitor. Sounds like red and blue are not working. If you've tried a new monitor, I'd try a new video cable next. Then clean the connector on the back of the computer (compressed air). Finally, replace either the video card or the computer.

Oct 04, 2010 | Computers & Internet

1 Answer

My Dell E176FP 17" LCD monitor keeps cycling colors -red green blue black then colors again... (More) My Dell E176FP 17" LCD monitor keeps cycling colors -red green blue black then colors again during...


well that could be because the screen is going bad. you might want to get another one or take it in to get it fixed, no more than 100 to fix your screen.

Feb 13, 2010 | Dell E176FP 17" LCD Monitor

1 Answer

Monitor keeps going blank, then once this a.m. it cycled in colors, white, red, green, blue, grey- very weird... what's up with that?


it's doing testing in color codes to refresh the color on the screen, if it keeps going blank, that's usually a sign of monitor going bad.

Oct 16, 2009 | Westinghouse L1928NV Monitor

1 Answer

Brand new monitor screen doesn't have any red


Take it back and buy a recognised brand monitor looks like yours could be a melon .Even a second hand one by Acer would be better.

Jul 29, 2009 | Soyo Computers & Internet

2 Answers

Monitor turns green


This sounds like a problem with the cable. Monitors have Red, Green, and Blue signals. I have seen it where the cable has a short, or the plug has a bent or loose pin, and this causes the monitor to turn green.
It is also possible, but doubtful, that the video card is trying to run it as a Black and White monitor. B&W signal is sent over the green channel.

Jul 29, 2009 | Samsung SyncMaster 753S 17" CRT Monitor

1 Answer

Help.. LCD colors


Reconnect your cables!  Somehow you don't have red and green in there, just shades of blue, right?  And it doesn't depend on whether you're running a browser or something else?

Make sure everything's tight and if you can (but only if tightening cables didn't work,) check that your computer's putting out a normal signal by testing another monitor with that computer.

Nov 11, 2007 | ViewSonic VA520 15" Flat Panel LCD Monitor

1 Answer

Green color missing from my LG 700s model


as you are electronics engineer so let us discuss technically.

as you are unable to see green colour means you might be seeing picture of magenta colour

as technically

red+blue = magenta

crt has got three cathodes

your two cathodes circuit is fine one ckt that is green cathode circuit is not working.

for that problem your will have to check

  • cable from computer to monitor
  • loose contact in crt base.
  • crt connector loose
  • voltage on green video output.
  • green video output transistor might be defective.or print loose.
  • circuit related to green video ckt
  • green video signal coming to green video ckt.
  • & finally crt defective (in rare case.)
  • hope this will help
  • good luck.

 

 

Oct 16, 2007 | LG Studioworks 700S 17" CRT Monitor

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