Screen darker at the top

Peka · Peka #1 (**permalink**)

04-21-2012, 02:19 PM

Hey, I've got a 2007 iMac & when I turned it on today the top half of the screen was definetely darker... It's as if I had lowered the brightness for half the screen or something like that. Any clues on whay this could be happening?

chscag · chscag #2 (**permalink**)

04-21-2012, 04:10 PM

Let's test it: Take a screen shot of your desktop. If the screen shot shows the same dark top and light bottom, the fault is probably with the graphics adapter. If the screen shot shows normal, then the fault is likely the LCD display itself.

Peka · Peka #3 (**permalink**)

04-21-2012, 04:26 PM

Then it's the LCD display. But after an hour or so it went back to normal again. Does that mean that my display is slowly dying? (Bc I was told this was not the first time it happened)

chscag · chscag #4 (**permalink**)

04-21-2012, 11:00 PM

Sometimes as an LCD ages it can change characteristics - discoloring, shading, etc. It does appear that yours may be doing the same. Not much you can do to prevent it other than swapping out the LCD itself.

You never mentioned the particular model iMac (screen size) in order to determine a replacement cost. Anyway, look here for approximate cost.

chscag #2 (permalink)
Member Since: Jan 23, 2008 Location: Fort Worth, Texas Posts: 32,024 Mac Specs: 21.5" iMac 2.5 GHz i5, iPad 3rd Gen., 3 iPods	04-21-2012, 04:10 PM Let's test it: Take a screen shot of your desktop. If the screen shot shows the same dark top and light bottom, the fault is probably with the graphics adapter. If the screen shot shows normal, then the fault is likely the LCD display itself. Community Guidelines
	QUOTE Thanks

chscag #4 (permalink)
Member Since: Jan 23, 2008 Location: Fort Worth, Texas Posts: 32,024 Mac Specs: 21.5" iMac 2.5 GHz i5, iPad 3rd Gen., 3 iPods	04-21-2012, 11:00 PM Sometimes as an LCD ages it can change characteristics - discoloring, shading, etc. It does appear that yours may be doing the same. Not much you can do to prevent it other than swapping out the LCD itself. You never mentioned the particular model iMac (screen size) in order to determine a replacement cost. Anyway, look here for approximate cost. Community Guidelines
	QUOTE Thanks

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Peka #1 (permalink)
Member Since: Apr 21, 2012 Location: Chile Posts: 2	04-21-2012, 02:19 PM Hey, I've got a 2007 iMac & when I turned it on today the top half of the screen was definetely darker... It's as if I had lowered the brightness for half the screen or something like that. Any clues on whay this could be happening?
	QUOTE Thanks

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