Question about LG Flatron F700B 17" CRT Monitor

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Screen Gone "Yellowish" Colour, Appears that Blue colour is not working

For some reason, when the monitor is turn on after 6 hours of rest or more, the monitor screen will turn yellowish just after a few minutes it is turned on. It looks like there are only yellow and red colour, without blue colour. It will keep yellowish in a while. If it is keep turning on for half and hour or more, it will become normal again. However, this will not happen after the monitor is working a long hours. Is this something wrong with the components inside?

Posted by Jiunn Yann Looi on

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Anonymous

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Your problem is in blue color cathode circuit. as you say that it becomes ok tha5t means 1 cable wire is loose from computer to monitor. 2 crt base loose. 3 loose contact in blue video ckt. 4 signal processor cable to crt board connector loose.(blue wire)

Posted on Sep 26, 2007

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Yellowish screen

On a CRT, "yellow" is a mixture of all 3 "primary" colours.

So, if you are expecting some other colour, then one of the 3 "guns" that are emitting one of the primary colours is NOT working correctly.

For less than $100, you can purchase a new, 19-inch (not 17-inch) LCD (not CRT) monitor.
This is less expensive than taking the CRT to a TV/video store for trouble-shooting and repair.
1helpful
1answer

Printed colours doesn't match with monitor colours

Here is a list of reasons why colours on electronic designs might differ from printed designs:
  • Monitors work in the RGB (Red,Green,Blue) colour space while printers use the CMYK (Cyan, Magenta, Yellow and Black) colour space.
    Designs look fine on a monitor if they are designed in RGB to begin with. Converting them to CMYK might make them look odd on screen, but they will print correctly, to a certain measure. It is difficult to sign of an image file that is currently in CMYK mode while viewing with an RGB monitor.
  • Monitor settings differ.
    The designer was sitting in a darkish room when choosing the blue and his blue looks vibrant. The client was viewing the same design in a well-lit room, making the blue seem lighter. The designer uses an LCD display and the client uses a CRT monitor and the vibrancy differs. The contrast and saturation settings on each monitor might differ as well, rendering the blue with different values.
  • Each printer in the world prints colour slightly different.
    Sometimes it is really obvious and sometimes it is almost impossible to see the difference. Normal desktop printers are definitely not something to do colour proofing with. If you print the design out on your desktop printer then a slight shortage on any of the colours will make the colour come out wrong. There are a lot of factors that can influence even the most expensive printing equipment. These include altitude, humidity, the current heat of the printer, age of the printer, quality of ink, the paper that is being used, special coatings on the paper etc. Even viewing the same printed material in different lighting conditions may make the colour seem different.
Tips on getting the most accurate colour
Go to your nearest printer company and ask to see their Pantone colour matching system. Each colour in the Pantone chart has a matching number. Most design applications have the same Pantone charts built in so that colour matching is easy. Read up on Pantone at Wikipedia. Make sure that the file is converted to CMYK (If not designed in it originally) before sending it to print. Some printer companies might ask for colour separation prints which the leading design packages can produce. It is also important for the designer to choose the correct colour management profile in the design package.
0helpful
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Yellowish colour of the monitor

check the datad cable of monitor, if ok.then soldring may be dry ot the CRT neck
0helpful
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The colour depth of my monitor is more yellowish.

is better check your vga cable which attached pc to monitor or change your monitor color on setting
bye
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1answer

Yellowish screen from boot up.

Once you press the menu button which is on the monitor if you get menu button then try giving reset or restore factory settings in it.

This solves your problem if your RGB colour settings is not configured correctly.

If your problem still persists then there will be problem in the monitor .
As you have mentioned (YOU HAD IT FOR A WHILE) in your problem if you have manufacture warranty then make use of it.

There is no problem with your CPU,motherboard and any other hardware part except the monitor.

Regards
-Dileep Bradley

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Hi my monitors screen becomes yellowish.all colour effected y dis

Hi,
Do you have a CRT monitor?
Have you tried to adjust the color on the monitor?
How is it connected to your computer?
It sound like one of the guns on you monitor died. But there is some testing you should do first.
If it is a CRT monitor and it is connect your computer properly. First thing to do would be to replace the cable and or try a different monitor that you know works.
To confirm try adjusting the color. If that does not work, if it more purplish it is the green gun, if it is orangish it is the Blue gun. That would be cause by a failed gun or driver.
If the gun is gone it is best to get a new one. It will save you money in the long run.

Thank you...
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3answers

LG 17'' LCD Monitor VGA 15 pin connector pin diagram

pin no 1 - Red colour signal (Red colour wire)
pin no 2 - Green colour signal (Green colour wire)
pin no 3 - Blue colour signal (Blue colour wire)
4&5 Not connected
pin no 6&7&8 are (Grounds)RGB Returns
9&10 NC
pin 13 Hohizontal sync signal
pin no 14 vertical sync signal
Not nessasry other pins
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I cannot ajust my screen the colours are awful

Check your vga driver is working ok otherwise run the vga driver setup ajust the resolution and refresh rate your monitor will be ok

If you monitor is red/blue or yellowish then you have to replace it because colour

Go to control panel then choose system - hardware - device manager - > expand the display adapter any exclamation mark or question mark there.

That means you have to reinstall its driver .

Thanks Hothawk
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Dell E196FP TCo99 Monitor screen problems

The screen colour changing is apparently an auto test procedure on the monitor and was prompted by a fault with the monitor not automatically shutting down when the computer is shut down. The settings on the monitor have been adjusted to rectify this and the problem is now gone.
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