wavy screen on my new LG 19 inch

[MaTT^]

Ok, so i recently bought a 19 inch monitor from best buy and have noticed when i go to dark webpages or even play games, there is a wave up and down the screen. Does anyone know why that is? Is there a setting that is wrong with it? I thought I got a good one with 2ms delay time and 3000:1 contrast ratio. Anyone know how to fix this? I already made sure the plugs were in tight so it's not the connection, but something different.

Anybody know?

Thanks,

Matt

[Mobious]

Some brands have a weird dynamic lighting setting where the CCs in the backlight do a "wave" motion to ease strain on the eyes. If you have the instruction manual, see if it's got a setting that does that or something of the like. If that's not it, it could be two other things: 1. your refresh rate is off/not optimal, or 2. you got a dud, pack it up and return/swap it out.

-Mobious-

[MaTT^]

How would I go about making sure my refresh rate is optimal?

[Trap05]

How is it connected VGA or DVI? If it's VGA try the DVI if possible. Is your power cable wrapped around the monitor cable or if it's close separate them and then see if the problem is still there.

[Mobious]

How would I go about making sure my refresh rate is optimal?
Go into the display properties, and under the "settings" tap, click "advanced". In the next window go over to "monitor", make sure that "hide modes this monitor can't display" is checked and open the dropdown. First, make sure its at 60Hz, if it isn't set it to that and see if that helps. If it's already at 60Hz and its causing the issue, see about bumping it up to 72Hz or 75Hz, and see if the issue still exists. If the problem still exists after this, as well as after Trap05's procedure, I'd suggest posting the issue to LG and see if they have an answer before sending it back.

-Mobious-

[Illah]

LCDs don't refresh, the refresh rate is pointless. If you're sitting on a webpage the screen is static - the pixels simply stay on. It's not until the content on-screen changes (i.e. movement, load a new page, etc) that the pixels will change color and 'refresh', and when that happens they do so at the response rate of 2ms or whatever. Set it to 60Hz - which is the standard for LCDs - and that's it.

Refresh rates are from the CRT days which had to constantly re-draw the screen every 1/XX of a second no matter if the screen was static or not, in which case higher refresh rates were better. LCDs simply don't work that way.

As for the issue at hand:

1. If there's a dynamic contrast setting turn it off. It's a marketing gimmick. 3000:1 in a consumer monitor is almost surely achieved via dynamic contrast, which is a fancy way of saying, "Let monitor adjust brightness and contrast at will." Confused monitor might mean waves.

2. If you're connected via analog, goto this page, maximize the window, hit F-11 to further max it out, and use your monitor's auto calibration feature. The grid will help your monitor sync up properly, that might help as well. My analog connected Samsung 245BW was blurry in some parts of the screen and harsh in others (sort of wavy looking I guess) until I visited this page.

http://www.techmind.org/lcd/phasing.html

--Illah

[Mobious]

LCDs don't refresh, the refresh rate is pointless. If you're sitting on a webpage the screen is static - the pixels simply stay on. It's not until the content on-screen changes (i.e. movement, load a new page, etc) that the pixels will change color and 'refresh', and when that happens they do so at the response rate of 2ms or whatever. Set it to 60Hz - which is the standard for LCDs - and that's it.

Refresh rates are from the CRT days which had to constantly re-draw the screen every 1/XX of a second no matter if the screen was static or not, in which case higher refresh rates were better. LCDs simply don't work that way.

I wouldn't go as far as saying that refresh rates on an LCD are "pointless", b/c they're still there no matter what. Changing the Hz frequency on the computer means that the computer is outputting at that certain frequency (60Hz, 72Hz, 75Hz, 85Hz, ect...), but the monitor can only handle just so much. The higher the resolution, the more detail needs to be drawn/processed so it has to run slower (at a lower frequency). Between CRTs and LCDs, it's pretty much the same. A CRT will overwrite the pixel each time it sweeps weither it needs it or not, that just how they work; and LCD will do the same thing, but it will just keep whatever charge there is on the electrode, but it is still receiving the same signal at a certain "refresh" rate transmitted by the GPU of whatever it is plugged into. I will admit, CRTs do in fact "refresh" by sweeping over the entire screen and resetting all of the pixels, whereas LCDs just change the specific pixels when necessary instead of sweeping over the whole screen in an even line, but it is still a "refreshing" action whichever way you look at it (ie: extreme black to extreme white on all pixels, sounds like a refresh to me :p). And as an FYI, there are a few 46"+ LCD TVs from Sharp and Samsung that are 120Hz screens (4ms GtG, 8ms BtW = 125 FPS / 120Hz), but 60Hz is the most common refresh rate.

-Mobious-

[Illah]

Yeah, I guess with analog the signal would at least be sent along with refresh-rate data included and handled by the LCD however it pleases, so that's a good point. I think what I was saying was more relevant to DVI connections where refresh rate is essentially meaningless AFAIK.

--Illah