Originally published at: http://www.howtogeek.com/186780/ask-htg-what-should-i-do-after-purchasing-a-new-computer-monitor/
Although monitors are largely a plug and play device, there’s more to setting up a new monitor than simply plugging it in and turning it on. Read on as we show a fellow reader how to quality check his new monitor and help it put the best face forward.
I have a monitor which has been showing three full length vertical lines which are each stuck on a different colour. What the problem here - three lines of dead pixels?
@unesavage: Most likely there's a defect in one of the monitor's boards and it's dying with little that can be done (aside from contacting the company/filing a warranty claim). That said... there's a very rare chance that something else is causing the issue (like malfunction with the video card) so before writing the monitor off I'd suggest doing a few simple tests, if possible.
The easiest is to test the monitor in the absence of a video signal from the computer and to examine the cables. You can unplug the video cable from the monitor (but leave the power on) and cycle through the various on-screen menus to see if the line persists in the absence of a video signal from the computer. You should also take this time to examine both ends of the video cable and make sure there isn't any damage (like bent or loose pins). Also, if you have the ability to connect it with an alternative input, now would be a great time to try it out. If you're using VGA, try DVI (or HDMI if available).
While you're fiddling around in the on-screen menu system of the monitor, look for a factory reset option. It's a long shot, but perhaps resetting the monitor will resolve the problem.
For more advanced troubleshooting you can also hook the monitor up to another computer and see if the lines persist. If they do, the defect is in the monitor. If they do not (and the monitor appears fine when it's in test mode and/or hooked up to a new machine), then there is something strange going on with the original computer and you'll need to find another monitor to test the original machine with to see what's going on.
Finally, if you're willing to invest some time in order to stave off spending the money on a replacement monitor, don't rule out opening your computer case to clean the GPU (blow the dust out, make sure the fans are operational and there isn't dust caked on the blades). Stressed/overheated GPUs can do quirky things and vertical/horizontal artifacting isn't out of the question.
I'm lucky as I work in the office machine industry, and have several accounts that have to have calibrated monitors. I use the x-rite eye-1 to calibrate monitors/printers so I just use them on my home equipment. People don't know how far their monitors are out of whack when they buy one. I get service calls all the time saying the colors don't look right. Well, yeah, they ARE correct, but your monitor is way off.
At least there is a "little bit" of help with the one built into windows. Plus, people don't keep their monitors calibrated to the correct light temperature.
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