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View Full Version : Grainy LCD screen on G73JH?



octiceps
11-28-2011, 04:40 AM
Hi everybody. For some reason, I've recently been noticing some weird graininess to the LCD screen on my G73. It flickers and looks almost exactly like film grain used in movies:

http://upload.wikimedia.org/wikipedia/commons/5/5e/MartinIversenNorway1991Grain.jpg

I can only see it when I'm about 2 inches from the screen and looking at something really dark such as the pages on this forum. It's really not that pronounced. My system is otherwise completely stable. I'm just curious if anyone else has noticed this.

380mcn
11-28-2011, 08:24 PM
RMA with it..

dstrakele
11-28-2011, 08:40 PM
For screen flickering on gray backgrounds, check out this thread: http://www.asusrog.com/forums/showthread.php?5536-Asus-G74-screen-flicker-(dark-backgrounds-and-low-brightness)&highlight=flicker

For the grainy image - do you see this with ALL images? What screen resolution are you using?

octiceps
11-28-2011, 11:58 PM
For screen flickering on gray backgrounds, check out this thread: http://www.asusrog.com/forums/showthread.php?5536-Asus-G74-screen-flicker-(dark-backgrounds-and-low-brightness)&highlight=flicker

For the grainy image - do you see this with ALL images? What screen resolution are you using?

I only see it with really dark colors such as the background on this page. I can't even see it on most grays; the image has to be almost completely black. I'm running native resolution (1600x900) @ 60 Hz.

Honestly, it's really obscure and I doubt most people would even notice it unless they were actively looking for it. Just shows how OCD I am. :p

octiceps
11-28-2011, 11:59 PM
RMA with it..

If it's not the sign of a major problem why would I waste my time doing that?

dstrakele
11-29-2011, 02:29 AM
From how you describe the flicker issue, I agree with you. If you were to RMA it, there is a 100% chance (and I don't even have to say 99.999999% chance) that the unit would be returned to you with nothing done to it. It would be a complete waste of time.

I not certain I understand your grainy image issue, however. Are you saying the images are grainy only if they are dark images? If you get 2" from the screen, you should be able to discern the individual pixels.

JRd1st
11-29-2011, 02:36 AM
I can't think of any way to get something like that unless it's a type of static, like in the old days of broadcast TV. How you would get that on a digital system . . . I have no idea. Unless it's coming from a bad video cable. :shrug:

octiceps
11-29-2011, 05:01 AM
From how you describe the flicker issue, I agree with you. If you were to RMA it, there is a 100% chance (and I don't even have to say 99.999999% chance) that the unit would be returned to you with nothing done to it. It would be a complete waste of time.

I not certain I understand your grainy image issue, however. Are you saying the images are grainy only if they are dark images? If you get 2" from the screen, you should be able to discern the individual pixels.

Actually, I don't even have to be close enough to discern the individual pixels to notice the flickering "grainy" effect. When it's really noticeable, such as on this forum, I can see it from my normal viewing distance. And the weird thing is, after testing different colors and backgrounds on my screen, I don't even see it on all dark colors. It seems to rear up only on very dark grey colors almost approaching black, such as the background to this forum.

I saw the thread you pointed me to at http://www.asusrog.com/forums/showthread.php?5536-Asus-G74-screen-flicker-%28dark-backgrounds-and-low-brightness%29
That's the exact same issue I'm having.

octiceps
11-29-2011, 05:06 AM
I can't think of any way to get something like that unless it's a type of static, like in the old days of broadcast TV. How you would get that on a digital system . . . I have no idea. Unless it's coming from a bad video cable. :shrug:

That's exactly right, it looks like static. The thread that replied to @http://www.asusrog.com/forums/showthread.php?5536-Asus-G74-screen-flicker-%28dark-backgrounds-and-low-brightness%29 describes my problem exactly. Seems like I'm not the only one noticing this.

dstrakele
11-29-2011, 05:42 AM
So it is more like 'snow' on a TV set as opposed to changes in brightness over the whole screen at one instant or horizontal lines of different brightness moving up or down across the display?

I wonder if that can occur as the result of a bad video cable connection, a faulty cable, electrical interference, or poor grounding? If you can see this in all display models of your system, I'd suspect the explanation given in that thread is the more likely cause, however.

EDIT: I wonder if any of the parameters discussed in this thread (http://www.tomshardware.com/forum/304938-33-pixel-clock) have any bearing on this issue. Particularly one of the later posts that describes the various video parameters.

It sounds like posting this issue on the NVIDIA forum may be useful...

octiceps
11-29-2011, 09:22 AM
So it is more like 'snow' on a TV set as opposed to changes in brightness over the whole screen at one instant or horizontal lines of different brightness moving up or down across the display?

I wonder if that can occur as the result of a bad video cable connection, a faulty cable, electrical interference, or poor grounding? If you can see this in all display models of your system, I'd suspect the explanation given in that thread is the more likely cause, however.

EDIT: I wonder if any of the parameters discussed in this thread (http://www.tomshardware.com/forum/304938-33-pixel-clock) have any bearing on this issue. Particularly one of the later posts that describes the various video parameters.

It sounds like posting this issue on the NVIDIA forum may be useful...

I don't think I'm gonna worry about it anymore. A couple of people on the other thread in this forum said that it's just an inherent problem with the LED dimmer in the ASUS laptops and shouldn't be a problem if you can tolerate it.