Apple Cinema Display HD 23 (M8536) Create issue. Issue #11 resolved. Jens Holst Schumacher repo owner created an issue 2012-08-19. Add support for the 2002 acryl. From 1999 to 2004, Apple released the 22-inch Apple Cinema Display (DVI in 1999, ADC in 2000), the 23-inch Cinema HD Display (ADC, 2002), the 20-inch Apple Cinema Display (ADC, 2003; DVI, 2004. 20-inch Apple Cinema Display, model A1081. Viewable: 20.1 inches. Resolution: 1680 x 1050 @ 60 hertz (Hz). Weight: 13.90 lb. (6.30 kg). 23-inch Apple Cinema HD Display, model A1082. Viewable: 23.0 inches. Resolution: 1920 x 1200 @ 60 Hz. Weight: 14.90 lb. (6.75 kg). 30-inch Apple Cinema HD Display, model A1083.

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Hello there, rogerpan.

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The following Knowledge Base article provides some in-depth instruction on troubleshooting Cinema Display:

Although the entire article provides very useful information, you may want to review the following section in detail:

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No video or no signal, image distortion, 'snow,' or flickering

Check connections

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When using an external display be sure to check the following:

If you're using an Apple notebook, confirm the AC power cable or adapter is securely connected to the computer and the cable providing power to the display is also secure. It is always good to have your notebook connected to AC power when an external display is in use.
Confirm display adapters are fully seated in their respective connections and that they are supported models and for the computer and display. Refer to these articles to assist you with adapter compatibility and further configuration information:
Remove all display cable extenders, KVM switches, or other like devices and retest to determine if the issue is resolved.
Try unplugging the video adapter or cable and then plug it back in.
If more than one video adapter is in use (or 'daisy-chained'), troubleshoot by using only one adapter.
Example: A mini DisplayPort to DVI adapter connected to a DVI to HDMI adapter is an unsupported configuration because there is a series of adapters in use.
If available, try using a different display and or adapter (or use a different connector by using DVI instead of VGA, for instance).

Reset the system
You can reset the Mac's parameter RAM and SMC.Reset the resolutionStart by resetting the Mac's parameter RAM. If the display does not come up, was previously set to an unsupported resolution, and still results in no video:

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Start up in Safe Mode.
From the Apple () menu, choose System Preferences.
Choose Displaysfrom the View menu to open the preferences pane.
Select any resolution and refresh rate that your display supports.
Restart your computer.

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Thanks for reaching Apple Support Communities.

Cheers,

Pedro D.

Jun 10, 2013 8:44 AM