dark shadow on laptop screen...?

[joko]

the screen looks perfectly fine normally, but whenever i am watching a film and the image goes dark, or blank, i can see a kind of dark stripe from top to bottom, about 2 inches or so wide at the top tapering to about one inch, on the left hand side of the screen.
i cannot see it when the machine is off as it needs the low level glow behind to make it show

its been there a while and doesnt really cause me any problems - but just wondering what it could be? why its there? and does it need looking into?

thanks

[AutomaticGal]

i think the films your watching are a different resolution to your screen.

like wide screen movies even on the telly have a black strip top and bottom of the picture as the telly is not wide enough to stretch it out. same thing with laptop monitors

[joko]

err ... thanks but no, its not that...i am aware of the widescreen thing

...this is a shadow...only one, that, as i said above, is only visible when the screen goes dark - not there all the time, and is not a strip of black ...but an oddly shaped shadow...

its not down the far left side but mid left...

can any one help?

[ChuckFickens]

Backlight leakage/bleed

It happens it most screens to a grater or lesser extent.

http://www.tftcentral...5_backlight_bleed.jpg

[ChuckFickens]

I should say most LCD screens.

Most LCDs have two backlight tubes on either side of the screen and slight manufacturing defects cause backlight bleed from them when a true black screen should be shown .

Nothing that can be done about it and it's not considered a fault.

[joko]

cheers chuck its probably that.

its more of a stripe that the blurry blotchiness of that pic but sounds more likely

[ChuckFickens]

it can show itself in several different ways.

http://www.google.co....b=wi&biw=1440&bih=713

[joko]

it actually doesnt look like any of them...most there seem to have lightening round the edges... and inparticular in the 4 corners...this does not at all... the clear bits are very clear...not at all mottled...and although the edges of the shadow are blurred they are much sharper than any of them....

still, it sounds the most likely cause