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Does the Verical line on the monitor also come when the monitor is unplugged from teh system. If yes the problem is with the monitor. If no the problem is with the video card. The computer maufacturer may have given you cds to run diagnostics on the card. Eg on dell system , you need to press the f12 key 5 times after you turn the system on , to run the diags
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Turn off the monitor and disconnect it from the back of the pc. This way you will isolate the monitor from the PC. Now turn on the monitor, if you still see the vertical line then that means the screen is bad and you would need a new monitor.
If the monitor doesn't have the vertical line then that means your video card is the issue or if you have an integrated vga port on the back of the computer then the motherboard is bad and would need to be replaced.
The video card (built-in on the motherboard) maybe faulty or the LCD screen is faulty. Connect an external monitor to the video port of your laptop, power up the monitor first then boot up your laptop. If the video card id OK then the laptop will automatically divert the video to the external monitor. Then the problem is a faulty LCD screen. If the external monitor also displays black vertical lines then you have a faulty video card and since it is part of the motherboard it is impossible to fix.
Tryconnecting an external monitor to the laptop. You may have to select the videooutput to display on the external monitor by holding down the blue key and pressing the blue CRT/LCD (located on one of the keys, likeF8,F9, etc..). If the problem occurs on the external monitor with the batteryor AC power, then you have a problem with either the video card or motherboardin the laptop. If the problem does not happen using the external monitor thenyou laptop's LCD display is going bad.
You should have a video plug on the side of your laptop. It might be a 9 pin plug or a 15 pin plug. You can attach an external monitor or LCD monitor to this plug. If the green line displays on the external monitor then your video circuit on your laptop is faulty. If the line is not present on external display then your laptop LCD display panel is defective.
Apparently it is a display hardware problem.
Try another monitor with the same cable and video card. Then you should try another cable. Then another video card.
If vertical line doesn't show in either case, then you should replace the appropriate device\cable.
If it shows anyway, then bring your monitor to service center for diagnosis.
Hello janicezavitz, this is usually a driver problem: your computer and the video card does not work properly (or the wrong software driver is being used for the video card or maybe the refresh rate is out of range for the monitor). you can try to plug in a different monitor swap the video card into another pc or try a new one make sure the correct software driver is being used for the video card.
or try this: 1. Restart your PC and Boot into safe mode 2. right click on my computer. 3. Go to device manager 4. uninstall your video card (display adapter). Be sure to note the type of video card you have!!. 5. restart your PC again and now start up normally 4. adjust your desktop resolution (800x600 or 1024x768 etc) The lines should now go away .If not it might be your display or monitor problem. 5. and if the lines are gone, you should download and install the latest drivers
There could be 3 possible reasons for a vertical lines
1. Driver for graphics card needs to be updated 2. Grpahics card faulty 3. LCD problem
try connecting an external monitor and see if the display is also vertical on the monitor, if yes the problem is graphics card, if no, the problem is the LCD. Hope this helps
Most of the time it is due to a hardware issue like a video card or the screen itself.
When does the line appear? A. Is it there even with the monitor or laptop turned off? B. Is it there during the OS logo / boot screen or does it appear after the OS loads? C. If it is a monitor, with your system turned off go into the menu of the monitor by using the buttons on the front. Is the line there?
What you can do to try and fix it is.
1. Make sure you have all the latest drivers for your video card. 2. Change the resolution of the screen. 3. Change the frequency of the monitor.
If these do not fix your issue you may want to look at getting or borrowing a video card and replacing it if this system is a desktop. If this system is a laptop and the above does not fix the issue your best bet would be to put up with it or buy a new laptop to be honest.
Try connecting an external monitor to the your laptop and see if the vertical line is also present on the monitor. If the monitor display is fine, then your laptop’s LCD display panel is defective. If the monitor also displays the vertical line, then your problem is with either the video card or motherboard located inside your laptop.Not sure if the Compaq Presario has an external monitor plug, but if it does the above procedure can be applied to that one as well.
Your Display cable (inside your monitor) needs to be replaced.
I would look on ebay to try and find the part and then take it to a local tech to replace it for you as I would not recommend anyone take apart a monitor (LCD OR CRT) if you had never done so before.
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