My 20" cinema display won't give opimal resolution with my MacBook

I just bought a 20" cinema display and hooked it up to my MacBook; I can tell that the cinema display is not at the 1680 resolution; It says it is from the Display drop down menu, but when i toggle between lower resolutions nothing changes;
It seems to be at the 1280 of the MacBook
I read some posts that talked about this problem;
Can anyone tell me about their experiences, and how to solve it?

OK, so my desktop was put to sleep overnight as I do on a daily basis and this morning my 4-month-old 23" cinema display was solid black. The power light was on and NOT flickering. I restarted, unplugged, changed power supply, also connected the display to my new MacbookPro but the Display refused to show anything.
I brought it to the Apple Store and they took it in for a whopping 21-Day repair! I am extremely upset that Apple would sell an expensive, professional peripheral that conked-out 4 months after its purchase. Luckily, I had read these forums and found out that the problem was not uncommon. I was wise to follow everyone's advice and spend additional $$ on Apple Care.
But 21 days for a graphic arts professional without his monitor and NO loaner is outrageous. The guys at the Genius bar did not even flinch or bat an eye when he took it in. It's as if I was returning a Hyunday to the dealer. At least, they offer a free 100,000 mile warranty.
What gives, Mr. Jobs?
Message was edited by: gotomike

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I have learned alot on these forums but seldom post. Thanks in advance!
I have a G5 dual 2.0 Powermac, not sure what OS- I should know but honestly haven't updated it in a couple years. It's hooked up to a 23" Apple Cinema Display. I went to turn it on yesterday and the monitor did not come on. The comp appeared to be on, the normal sounds were coming from the machine- the eject button worked, the volume buttons were working, hard drive spinning etc. tried moving the mouse, hit space bar, etc.
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Hi-
When the LED is "On", the display is "Off".
http://docs.info.apple.com/article.html?artnum=301944
You are sure that no flashing is occurring?
http://docs.info.apple.com/article.html?artnum=88366
Does touching the Power button on the side have any effect?
How did you reset PRAM? Keyboard command?
http://docs.info.apple.com/article.html?artnum=2238
Try resetting the PMU/SMU:
http://docs.info.apple.com/article.html?artnum=86760
Can you boot in Safe Mode? To start up into Safe Mode (to "Safe Boot"), do this:
-Be sure the computer is shut down.
-Press the power button.
-Immediately after you hear the startup tone, press and hold the Shift key.
-Tip: The Shift key should be held as soon as possible after the startup tone but not before.
-Release the Shift key when you see the gray Apple and progress indicator
Can you do a single user boot?
http://docs.info.apple.com/article.html?artnum=106388
Does video display when booting from OS X install disk?
http://docs.info.apple.com/article.html?artnum=300537
Reseating the graphics card may be worth a try.
G4AGP(450)Sawtooth, 2ghz PowerLogix, 2gbRAM, 300gbSATA+160gbATA, ATI Radeon 9800 Mac OS X (10.4.8) Pioneer DVR-109, ExtHD 160gb x2, 23"Cinema Display, Ratoc USB2.0, Nikon Coolscan

Cinema display won't turn on

So my cinema display will not turn back on if I have it on, remove the cord from computer then try to put the cord back in. However if I put the usb back in and put my mouse in the cinema usb port the mouse still works. I restarted my computer and the display turned back on but I am afraid of ever taking the cord out again. My main computer is a MacBook Pro.

I have an early 2011 MBP and a 27 inch Cinema Display. Sounds like I am having the same issue. So far, no solution.
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I am now on my second Cinema Display - My first display was replaced at the Genius bar - they said it had a defective "logic board". The second display - operated normally for about 6 months, but over the past month has been exhibiting these same problems. I still have a bit of time before the one year anniversay for the Display so the warranty is still valid. Given that this is the same issue that happened with the first display - I guess I will need to buy the extended warranty. Don't like the idea of having to pay to have this problem fixed on a regular basis.

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Hi s2pid,
Thanks for visiting Apple Support Communities.
You may find some of the other troubleshooting steps in this article helpful:
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/HT1573
All the best,
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Thank you!

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Message was edited by: Jason L

I'm trying to connect my 23" Cinema display to my iMac, need help with connector cable.

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according to www.apple.com the Mini DisplayPort/Dual-Link DVI Adaptor is only compatible with MacBook, MacBook Pro and MacBook Air equipped with a Mini DisplayPort...
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(48893)

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I have the following issue and was wondering if someone has an idea what the reason is or what can I do to fix this:
I have a 23" Apple Cinema Display running with a MacPro 2,8 GHz. When I switch to PC using BootCamp 2.1 with Windows Vista Service Pack 1 32bit the screen becomes extremely dark.
At first, on the PC side, the display has the correct brightness but after two seconds it switches to a very low brightness setting.
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1) In OS X, set the desired display brightness.
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Link here: <http://forums.macrumors.com/showthread.php?t=790910> for credit to resolution.
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This
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The ACD looks like:
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Hi All,
I have searched the forum and although I am sure this must have been addressed, I am in need of a specific response. I have a powerbook G4 17 inch with the ATI Mobility Radeon 9700 graphics card that it came with. In order to run an external display such as the Cinema Display 23" at native resolution of the display will i need to purchase a new graphics card?
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here are the stats for my graphics card:
ATI Mobility Radeon 9700:
Chipset Model: ATY,RV360M11
Type: Display
Bus: AGP
VRAM (Total): 64 MB
Vendor: ATI (0x1002)
Device ID: 0x4e50
Revision ID: 0x0000
ROM Revision: 113-xxxxx-134
Displays:
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Display Type: LCD
Resolution: 1440 x 900
Depth: 32-bit Color
Built-In: Yes
Core Image: Supported
Main Display: Yes
Mirror: Off
Online: Yes
Quartz Extreme: Supported
Display:
Status: No display connected

The 23" will be at full resolution if used in extended desktop mode, but if mirrored, can only match the Power Book's display resolution.

My 20" cinema display won't give opimal resolution with my MacBook

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