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CrossOver 27Q LED/LED-P, 27M LED, & 2720MDP GOLD LED Monitor Club - Page 207

post #2061 of 6483
Earlier I had stated that the CrossOver 2720MDP's input lag was tied with my Samsung S27A850D for around 18-20ms of input lag. I went back and checked and I had previously only done the input lag testing on my Samsung vs CRT with the SMT Tool 1.0 which gives values that are 6ms higher than what they should be.

Refer to this article for more information. The SMT Tool 2.0 is almost as accurate as an oscilloscope.

I did the input lag test again and they did indeed tie, however the actual input lag on the Samsung S27A850D is only 13.6ms when measured with an oscilloscope by PRAD.de which means that the CrossOver 2720MDP, which was was occasionally 1-2ms faster in my tests, has around 11-13.6ms of input lag which puts it ahead of the Achievea Shimian Multi PRAD.de tested (19ms), as well as most other high resolution IPS panels with scalers which typically have around 17-20 ms of input lag.
Edited by MenacingTuba - 8/7/12 at 10:12pm
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post #2062 of 6483
Quote:
Originally Posted by MechaCthulhu View Post

Bummer. Would you consider mine as average or excessive? I am trying to decide if it is worth the hassle of returning, or taking it apart to fix the power light since there is only one dead pixel.
Is this because it's LED instead of whatever Dell uses?
Thanks. I am still sifting through all the threads.

I could definitely see yellowy on the bottom of the panel.
and Besides of the yellowness, You have an absolute right to return the monitor by power on light damage.
You are not paid for damaged monitor.
You paid for brand new monitor.

So, why are you hesitating to make a claim?
post #2063 of 6483
Received my CrossOver 27Q yesterday but it's semi-DOA. From cold it works fine for 2-3 minutes, then slowly the screen starts showing artifacts and going crazy frown.gif Eventually most of the screen is green and full of lines. I've tried it on two different computers. My main one running a GTX 570 and OCZ 750w PSU. Turning it off and on doesn't help. I need to let it sit, unplugged from the power for a couple of hours to get any clear picture from it for a minute or two.

I've attached some videos that show what happens:

You can see how it's fine then slowly starts to have problems.



Has anyone seen this problem before? I've gone through most of the pages but haven't seen it mentioned anywhere.

I'm going to try a different dual link DVI lead in case that fixes it but I'm not holding my breath.

EDIT: I've tried a new dual link DVI lead and it's the same problem frown.gif
Edited by Hates - 8/8/12 at 2:15pm
post #2064 of 6483
Probably depends on how much it bothers you. Some sellers won't accept it for return based on just the yellow tint, I would guess. I'd contact yours and ask if you find it excessively noticeable and irritating.
   
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post #2065 of 6483
I am going to be using it for CG so I will be staring at a white screen a lot. I just don't want to return it for something worse if this is normal.

I have been having a lot of trouble with getting it to play nice with my gts 250 in linux. I have my TV connected by HDMI on a separate x screen which a lot of DM seem to have trouble with now, using xfce. I have been using tips about editing the xorg.conf, the problem is now the TV is coming up as 640x480. I found this post about using a custom edid http://learnitwithme.com/?p=342

I contacted red-cap about returning, they seem to be taking their time responding. I had to send them more pictures since they could not access the dropbox link I sent them.
Edited by MechaCthulhu - 8/8/12 at 12:56pm
post #2066 of 6483
For anyone interested:

Going from 1920x1080 ->2560x1440

In Heaven, (no AA) for consistency I went from 109 -> 72fps

That's roughly around a 34% drop of fps from the GPU alone (Heaven being a GPU bench and all)
post #2067 of 6483
Quote:
Originally Posted by TSXmike View Post

ordered my crossover on monday... i cant contain myself.

monitor came today. no dead or stuck pixels.

i am completely awe struck by this thing!
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post #2068 of 6483
Btw: Did anyone else get a version with DCR(Dynamic Contrast Ratio) in the OSD? It's bloody useless, I mean I knew it wasn't supposed to be anything special, but all it does is dim the whole screen's backlight when you put something black in the center of the screen, and then turn the backlight up to 100% when you put something white in the center...far from dynamic, if you ask me.

If you kept this on 24/7 you'd have fits lol.

Don't get me wrong though, loving the new display. The quality is like going from dvd to blu-ray. biggrin.gif
post #2069 of 6483
is acessorieswhole worth the additional price? They are like 50 bucks higher but comes with their "warranty" ...whatever their warranty would do in korea for my monitor in the U.S. is unknown
post #2070 of 6483
Hey, for anyone with the backlight/flicker issue, there may be a fix. I just picked up one of these monitors for super cheap, because the screen stays black. The power led changes from red to blue when connected to a video source, and the brightness buttons cause the led to flicker for a couple seconds before stopping.

I pulled the back side off, and found an issue on the LED Driver board. A mosfet on the board that was burned and some of the insulation on the board is curled back. I believe I found a replacement, and once it gets here, I will replace the mosfet.

This issue is most likely caused by the cheap/faulty power adapter, and could be the source of the yellowing forming on some screens after being on for a long time.

I have pictures of the board and issue, but they are on my phone and I'll have to upload them later.

Also, for the guy with the green screen issue, that sounds like the video processor has overheated, and separated from the motherboard. If there is someone in your area that does laptop video chip reflows, they should be able to repair the board, but it will most likely cost several hours labor.
Edited by Infinite-Dev - 8/8/12 at 11:36pm
    
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