2407WFP A02 wierd dot...

Question

Hello,   I've just received my 2407WFP rev A02 two days ago and noticed a wierd bright dot inside the panel. I can't tell if it is a stuck pixel or something else. When I checked my panel for dead pixels, I noticed a small very bright white dot on a black background. When I observed it closely, it seems like the bright dot is a bit higher  than other pixels (in the sense that all pixels are at the bottom and I used a magnifying glass) but the size is the size of a pixel. Then I changed the background colour to blue. I found out that the dot is less bright and smaller than on the black background, I observed it again using the magnifying glass. When I looked at it directly on top of the dot, it seems like the dot lies in between two perfectly functioning pixels (on the black pixel border). When I looked at it from one side, it seems like there is a stuck pixel on a particular pixel row but as i moved to the other side, the dot looks like it has shifted to another pixel row next to it. I can't find this dot when I use a red, green and yellow background. If it is a stuck pixel then I should see a white dot on all background. It is quite annoying as the dot is very bright on a black background but I can't hardly see it on blue. I've called Dell in my country to asked for a replacement as I got the rev A02, there is still the visible banding issue but not too bad and doesn't bother me as much as the dot. The person said that there is still no rev A03 in my country so if I want, they will try to arrange a replacement but it is still a rev A02. Should I keep my monitor or take the risk with another A02 that could have more banding? Thanks for replying.   Munif

ArchAnge1 · Answer

hi there, im the guy that said the 2407 a03 is not in my country yet, i live in Australia, A03 has appeared in many other countries. i will ring dell here tomorrow to get an update, last time i rang they still didnt even know anything of a03.... try get a a03 if you can coz people are much more happy with them it seems so far.

your white dot, coz you said you can see it on a blue background faintly, that complicates things. if it was only showing on black, it would clearly be a 'bright pixel' defect, which is common.

Im not experienced enuf you give you a definent answer there, but im sure someone else has the answer and will post shortly :D

all the facts · Answer

Try Dead Pixel Buddy free

http://www.laptopshowcase.co.uk/downloads.php?id=1

and

Passmark Monitor Test free

http://www.passmark.com/products/monitortest.htm

to start to analyze your problem.

A stuck "on" pixel shows blue on a black background.
A dead pixel shows as a gray pinpoint spot on a white background.

post back and tell us what you found.

Good Day

alg7_munif · Answer

Thanks for the reply,   I'm from Singapore and the Dell person that I called said that revision A03 is still not available here. I have used another program to locate dead pixels. I know that a stuck white pixel will appear white on every background but this dot looks to like a spec of dust inside the panel that reflects the backlight and only can be seen clearly on a darker background. On green and red background every single pixel lights up perfectly on my screen even when I look at it using a magnifying glass. How long does it takes to receive a replacement? I called customer care again today to check the status and the person said that the replacement is still not in stock. Could it be that I'm getting the A03 one?

all the facts · Answer

You would have to arrange an exchange, if Dell wants to they could overnight an exchange, don't know shipping schedules there, and I see you want an A03 but, don't wait to long and get passed your warranty limits.
That's what Dell will hold you to, whatever your return policy is in the guide that came with the montor. Starts on Page 8 U.S. version and terms vary around the world.

In the box you received the monitor in, did you see the note that states that white specs will appear on the LCD screen and it's from shipping. It's normal and I had white specs on all 3 of my 2407's. Shine a flashlight on the screen when it is "OFF" and you'll see the specs if you haven't wipprd then off yet. These specs are not shinny though. To remove these specs use a soft clean cloth. Is used a clean, 100% cotton, white handkerchief to gently wipe them off.

Well you probably tried wippnig it off and it's not the case and if it's something trapped inside the screen shield you'll have to exchange it.

Always return or exchange until you are happy with the LCD. Read all warranty information carefully.

Hope this helps.

Good Day!

alg7_munif · Answer

Thanks again,   The dot really looks like a spec trapped inside the screen. I hope the replacement will be better than this one... I didn't have any dead pixel on this (only the dot) and the banding is not obvious. I just hope that I won't get an A02 with a dead pixel, A03 is still not available here according to the person I talked with... Message Edited by alg7_munif on 09-07-200610:22 AM

Riffe · Answer

I too have some strange spec which isn't a dead pixel. I can't wipe it off and it moves when I move my head, so I figured it's something just below the surface. Getting a replacement though, because of my banding issues.

alg7_munif · Answer

I'm relieved to know that someone else is also having the same as mine. I don't really want to exchange my monitor as it doesn't have a dead pixel, to me the banding is not as disturbing as a dot on screen. Why do LCD manufacturers have this dead pixel policy? Is it because of more than half of the manufactured panels will have at least a dead pixel? If that is the case, then my replacement monitor will have more than 50% probability of a dead pixel or the percentage is much less than that? We can use the banding issue for replacement of A02 with dead pixel but if A03 has a dead pixel, Dell will not exchange the monitor right? Message Edited by alg7_munif on 09-07-200601:32 PM

all the facts · Answer

ChrisM knows about all these issues listed below and is trying to get these resolved in future versions but, don't hold your breath. Deal with your individual problems as they arise like you are doing now.

ChrisM was supposed to have met with BenQ yesterday and we are waiting to here of any progress made.
The A03 was an on screen display language fix only. None of the issues below were addressed in that version update. A lot of people here were upset. Let's see what they do now.

A02's and A03's still have all if not a lot of these issues listed here and can be reasons for exchanges.

Yes, dead or "ON' pixels are a current part of the LCD manufacturing technology and not uncommon. Percentages will vary from batch to batch but you could derive a mean percentage from an entire product run.

Other issues listed below you could Dell you have, if you have them, and they can’t say you don’t see them or are experiencing these problems.:)

Especially: (8) Vertical and horizontal banding in multimedia and gaming modes.

This has not been corrected in A02 or A03, but will appear worse in some test patterns and very little in others. It's an inherent part of LCD manufacturing technology. Once you understand the manufacturing technology you see what the engineers are up against. It's better to have LCD's with some issues then not available at all. I personally like LCD's a lot better than CRT's, that's just my opinion.

I know you see these problems listed below, as they have not been fixed in any 2407FPW yet,
Especially: (8) Vertical and horizontal banding in multimedia and gaming modes.
Also banding in Desktop mode that may effect your livelihood or income$$.
This in itself may render the LCD monitor unusable and under warranty they must replace it.

(1) The 1600x1200 fixed aspect (1:1) has NOT been fixed. The 1:1 option is still grayed out at 1600x1200. This is not good when you have an ATI graphic card.

(2) The inability to set 1600x1200 mode into 4:3 is one thing, but having this monitor forget about 4:3 setting is even more annoying. Whenever I run older games or other apps that uses fixed resolutions (such as starcraft, diablo2 etc), I'll have to navigate through the menu and set the 4:3 mode, then when monitor switches back to widescreen resolution of desktop, it seems forget about such setting and makes me navigate the menu to set 4:3 every single time whenever I start those programs.

(3) Same problem with PIP, input always defaults to S-video no matter what, when I switch to different input (i.e. component) and then shuts pip off, when I turn pip back on it always resets back to s-video.

(4) Moving mouse over bright backgrounds leaves a shimmery yellow, pink or green trail a few pixels wide on the A02 and A03.

(5) The whole screen shimmers when scrolling fast.

(6) Video tearing on 720p over both component/DVI when in 1:1 mode See http://forums.us.dell.com/supportforums/board/message?board.id=dim_monitor&message.id=58435 and http://forums.us.dell.com/supportforums/board/message?board.id=dim_monitor&message.id=62689
(7) Incorrectly displays 1080i over component giving an usable image.
(8) Vertical and horizontal banding in multimedia and gaming modes.

No matter how many times you ask for an exchange they have to provide exchange under the Advanced Exchange warranty stated in your Product Information Guide. This is so you are not without a monitor. They also are providing the box from the new monitor to return the no good one in.

A lot of the information above was based on that you do have Advanced Exchange warranty where you are. I know you have some kind of warranty and they must honor that warranty.

Always state the manufacturers defect (Example: Banding so bad it is an unusable product) (IMPORTANT: unusable product) to DELL and it's all Dell's fault and obligation for them to get you a brand new monitor. What's in writing in that Product Information Guide is your contract and when it comes down to it that's what Dell will hold you to regardless what a customer rep or supervisor said. Also, that’s what you hold Dell to.

You might find this interesting:

LCD vertical banding is a flaw that can occur in the manufacturing process of the LCD panels themselves, and some LCD panels will tend to manifest it more noticeably than others. The panels that cause the most visible problems are usually weeded out in the vendor's quality control process.
However, those that create just a hint of banding often pass through QC, since it is prohibitively expensive to discard all parts that exhibit flaws which may have no practical impact on picture quality.

So, we end up with a situation in which some LCD panels, even within a given production run on one model, will have no banding at all, some may have a hint of it that does not rise to the level of a significant issue, and some may have a more visible problem that really does impair the enjoyment of the viewing experience. In the latter case, sometimes the problem can be mitigated with internal adjustments made by the dealer or vendor service departments, and sometimes the LCD panels or the entire unit need to be replaced.

I have a panel with one dead pixel but it's in the lower right corner and not an issue for me. 2.5cm's from the bottom and 1cm. from the right side. It's not in my way.

Acceptable dead pixel counts in a panel this size 24”, are as high as 18 or more by some manufacturers standards. This would not be acceptable to me.

Hope this answers most of your questions.

Good Day!

_doug_ · Answer

Hi alg7_munif,

Just so you know you aren't going crazy. I also have a "weird" dot. Pretty bizzare, definately doesnt seem to be a dead/stuck pixel - something like a gap between pixels that lets the backlight through.

Doug.

alg7_munif · Answer

Thanks Doug,   Did you ask for an exchange for your monitor? I hate doing this, waiting for a new one and hoping that it won't have a dead pixel...

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2407WFP A02 wierd dot...

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