I got a new computer flat screen new at the local office store a couple years ago, and the screen started to flicker about a year ago. I increased the screen darkness to lessen the effect and hoped it would go away on its own, but it’s still here. It flickers once every few seconds. By “flicker”, I mean that the screen image is steady but the screen brightness oscillates between lighter and darker at an annoyingly distracting rate. Do I need to get another screen or is there an adjustment I can make to eliminate the screen flicker? It’s a smaller HP that cost over $100. I did a reset of the factory settings but that didn’t help.
did you change the hertz setting?
Per ajfrod you need to play with the horizontal refresh rate and see if the image stabilizes. If it does not it’s likely a defective hardware issue. You might also want to play with color depth and resolution. Also make sure your video cable is firmly seated or try another cable. Bad cables can occasionally cause flickering wonkiness.
How is the panel hooked up to your computer? VGA (blue plug), DVI (white plug) or something else?
Assuming you’re using Windows, try setting your screen saver to “Blank” (not “None”) and select “preview” or wait for it to kick in on its own. This will give you a blank screen but not instruct your monitor to go into power-save mode. Check for the flickering.
If it still flickers on a blank screen and you have a DVI, HDMI, or DisplayPort cable connecting the monitor to your computer, you probably have a bad CCFL backlight in the monitor.
If you are using a VGA connection, it is possible (but unlikely) that the flickering is coming from something like a bad DAC on your PC’s video card.
This is only true for CRT monitors (and it is the vertical refresh rate); LCD displays shouldn’t have any flickering at all regardless of the refresh rate of the video signal being fed to it (even if it accepted say, a 1 Hz refresh rate).
I’m thinking it has something to do with the monitor itself; for example, LCD monitors are notorious for using cheap underrated electrolytic capacitors which fail after a short time (as little as a few months).