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Probably the problem is not with the monitor. Your computer is defective and probably the lines appear because your VGA is defective.
To make sure your monitor is OK, you can connect it to another computer.
First check replacing the RAMs and then VGA.
Many people have problems determining if their monitor is bad or their video card is bad. One good way to test this is by swapping out your monitor with a friend, co-worker, or family member with a known good monitor. You can do this with either your computer tower or your monitor. Follow the two steps below: 1. Take your computer tower and plug it up to a known good monitor. If the computer boots up with no problems and you are able to see everything on the known good monitor, then your monitor is bad. 2. Take a known good monitor and plug in to your computer system. If the computer boots up and you are still having problems and getting a black screen or some message saying "no signal" then your are having problems with your video card.
Some common symptoms of a monitor going bad are as follows: 1. A humming or buzzing noise coming from your monitor. 2. Picture fades in and out. 3. Colors appear in various places on your monitor screen that normally would not be there. Most common colors presented are red, green, or a mixture of the two. 4. Picture presenting either light or dark and will not change no matter how much you change the color or tint setting. 5. Lines appearing on the monitor screen. These will look like the lines on a bad television. 6. Monitor takes longer than normal to present picture. This time can vary depending on how old your monitor is and how far into the malfunction phase it is.
Since your monitor works off the same principles as your television set, most the time it will present with the same symptoms as a television going bad. I hope this helps in your troubleshooting process to determine if your video card or your monitor is the one causing the problems. These symptoms apply to the regular monitor only and not necessarily an LCD monitor.
The easiest way to check this problem out is take your monitor over to someone who has a computer or if you have an extra computer at home hook the monitor up to see if it stops doing this. Then you will know if it is not the monitor. Then you can focus on the video card going bad or is bad. Change the card with a new one, problem is solved. Check the cables connections make sure they are not loose as well. Restart you computer also discharge it by pushing in the power button in while the computer is unplugged from the wall. John
is there anyway to try moniter on a different computer? it maybe the monitor, cable video card or software. if monitor works on diff comp then u know it's not monitor or cable, then try to update video driver
Check that the signal cable from the computer is firmly connected and that there are no bent pins in either end. If the trouble continues, the problem is in the monitor itself. Given the low replacement cost, it's uneconomical to try repairing these.
This issue may occur if the signal from the video adapter
exceeds the scan range of the monitor. The video adapter setting for updating
the screen (the refresh rate) is incompatible with the monitor. you should reinstall your video drivers in safe mode.
To restart in safe mode repeatedly press the F8 key during the computer startup. This will bring a menu where you'll be able to choose safe mode.
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.