Monitor jumping

[Johnno]

Hi all, I have an LG 15" Flatron LCD monitor and recently when starting up the monitor takes ages to show the screen saver and after the system is fully booted the images and the icons on the screen constantly flicker and jump about. There is also a evil looking black cloud type image in the bottom corner. So my question... is it a virus, is the monitor stuffed..or is it possessed !! Thanks for any help !!

[Track Cutter]

doesnt sound good, first of try another monitor on the comp to makes sure its not the graphic card or some evil virus (does the black cloud thingy look like some one created it or is it just random). if another monitor is ok then going by the images jumping around on screen it is most likely the digital pcb in the monitor or power pcb introducing ripple into it either would require board replacement and probably not worth it. let me know a model number and will do a fault search. Am a lg repair agent and tech for 30 years

[Archangel]

Make sure all the cables are plugged in properly. If one's making intermittent contact it could do some strange things like that...

[Johnno]

Many thanks guys...as far as I can tell all power cords appears to be fully plugged in...The cloud appears to more like a "fail" that eminates from the bottom right corner of the screen and appears to try to move further across the screen...does this make any sense ???? Also the images appears to be jumping up from the bottom of the screen ??

BTW the model is a LG Flatron LCD 575LE..... I think it was purchased about 4 years ago so I suspect its out of warranty.. T.C. are you familiar with this model ???

Also I recall reading "somewhere" that a TV occassionaly require "de gouzing" or similar with a procedure involving a magnet moved across the screen...does this also apply to LCD monitors...

Once again REALLLY appreciate the help !!

[Rixter]

Also I recall reading "somewhere" that a TV occassionaly require "de gouzing" or similar with a procedure involving a magnet moved across the screen...does this also apply to LCD monitors...


Degaussing only works on CRT monitors and it gets rid of any magnetic field in the tube. LCD monitors do not need to have this done :thumb:

[Johnno]

Degaussing only works on CRT monitors and it gets rid of any magnetic field in the tube. LCD monitors do not need to have this done :thumb:

OK thanks !!!!!!!!!

[Rixter]

Looked in to a site and found this it relates to a different LCD monitor but maybe you have the same sort of on screen display function with yours. :thumb: Hope it helps

There are noises in the video signal. The IMAGE SETUP function is used to adjust the level of noise in the video signal which causes horizontal lines or areas where the image appears to be unstable and jitters or shimmers. This can be done automatically or manually.

Use the image setup fix the problem:

1. Image auto Select (Image Setup) menu in the On Screen Display.
2. Select Manual to adjust CLOCK/PHASE settings.

On Screen Display Icon

Description
Image auto
Auto. If Auto is selected the image will automatically adjust.
Image manual
Manual. If manual is selected the user will go the manual adjustment screen. This will allow you to remove any horizontal noise and clear or sharpen the image of characters.

[Track Cutter]

there was no faults for this monitor on lg bulletin board, priced digital pcb ~$160. not worth replacing. has external power supply i see so is probably not that. think it may be time to upgrade if fault is not the computer

[Johnno]

Thanks TC !!!!!!!!!!!!! one final ....how could I establish if the fault is the computer...I have no other monitor...is it possible to somehow plug in the laptop...Toshiba Satellite sorry about the questions...I am technically inept and still get baffled by the microwave !!!

[ninevalleys]

well the only faults it could be within the PC is in the graphics card... if you have a graphics card uninstall it and unplug it, then replug the monitor into you motherboards onboard graphics... if you dont have a graphics card... well see if somone will lend you one and plug it in, install teh drivers and see if that fixes it.

NV

[whiz]

It's quite possible that you could plug your monitor into your laptop. Most have external outputs.
You'll only be able to plug it into the right connection but you might have to use a Fn key plus possibly one of your F keys above the numbers keys to get the output going to the external monitor.
Have a look on the F keys to see if there are any little symbols which look like they might be a monitor.
Then give it a try. You've got nothing to lose.

[Archangel]

It's quite possible that you could plug your monitor into your laptop. Most have external outputs.
You'll only be able to plug it into the right connection but you might have to use a Fn key plus possibly one of your F keys above the numbers keys to get the output going to the external monitor.
Have a look on the F keys to see if there are any little symbols which look like they might be a monitor.
Then give it a try. You've got nothing to lose.
I think his question was the other way around, ie. using the laptop as the monitor for a computer?

[whiz]

Yes, but faultfinding methodology says that we should determine exactly where the problem is. From this thread, we haven't yet determined if it's the monitor or the computer which is causing the problem.
If the monitor doesn't have the problem when it's hooked up to the laptop, we can definitely say that the problem isn't the monitor....