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Posted by BillW50 on March 10, 2008, 5:18 am
Please log in for more thread options Quaoar typed on Mon, 10 Mar 2008 00:58:21 -0600:
> Trevs laptop wrote:
>> Over the last few weeks, some marks on my laptop screen have
>> gradually got larger and now look like this:
>>
>> http://mynzlsite.hostsnake.com/laptopscreen.htm
>>
>> The marks are visible on darker backgrounds, but not on a white
>> background. I have been told that these marks could be the result of
>> "image
>> persistence", would you agree with this suggestion?
>>
>> http://compreviews.about.com/od/monitors/a/LCDBurnIn.htm
>>
>> I have tried cleaning the screen with proper LCD cleaning fluid, but
>> the marks will not come off.
>>
>> Any help appreciated.
>>
>> Thanks
>>
>> Trev
>
> These look like pressure marks or scratches on the surface of the
> screen. Are you sure that these are from the LCD itself? Image
> persistence is temporary, and disappears in over several seconds,
> maximum. There is no "burn-in" in LCD screens, arguments to the
> contrary based on the black/grey bars on standard definition TV on LCD
> screens notwithstanding.
>
> Pressure marks/scratching from the keyboard when the screen is closed
> has plagued several vendors. Scratching from
> fingers/fingernails/pens/pencils is common also. When the notebook is
> shut down, can you see these marks?
>
> Q
Oh I disagree that image persistence is very temporary on LCD screens. I
started to use clock applications which places a clock on the desktop
starting since last year. And I quickly noticed that the image
persistence can last for weeks here. Seems to be blue backgrounds, you
can see it the worst. And unlike CRT persistence, it is the dark parts
of the image that persists.
--
Bill
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