Name: Apple LED Cinema Display 27
Brand: Apple
Rating: 5 (1 reviews)

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LED Cinema Display (27-inch) Troubleshooting — General Troubleshooting 13

2010-11-18

General Troubleshooting

Troubleshooting Theory

For general information on troubleshooting theory, go to GSX and nd the Service Training

course menu link. From there you can access the Troubleshooting Theory self-paced course.

Also, refer to the following Apple Knowledge Base articles:

kBase #TS1388: Isolating issues in Mac OS X

kBase #HT1199: Mac OS X: How to troubleshoot a software issue

Update System Software & Firmware

Important: Before beginning troubleshooting, connect the display to a known-good computer

and ensure that the latest software and rmware updates have been installed. Some controls or

options for the LED Cinema Display (27-inch) may not appear in System Preferences: Displays if

incorrect system software is installed, or if the latest software and rmware updates (released at

or after the display’s introduction) are not applied AFTER the display has been connected to an

eligible computer.

If using a LED Cinema Display (27-inch) with Windows, run Windows Apple Software Update

after connecting the display in order to download software that will enable functionality

and support for Windows. If a computer is dual-booting, the display software will need to be

installed separately for both Mac OS and Windows.

Display Adapters

Apple does not support the use of “daisy chaining” or using multiple display adapters (of

any kind, active or passive) with any Apple displays. The list of possible symptoms observed

by doing this are broad, however, some more common ones include not being able to use

connected USB keyboards after waking from sleep, issues with distortion, and issues which do

not occur when only a single adapter is used.

Check Audio Features of Connected Computer

The LED Cinema Display (27-inch) has two ways to reproduce audio coming from a computer:

• Audio via the Mini DisplayPort, when computer does support this feature, and

• Audio via the USB port, for all computer models.

Before troubleshooting an audio-related issue, rst identify which computer model is used

with the display, and which cable(s) are connected. Computers released before 2009 will NOT

support audio output through the Mini DisplayPort.

Questions and Answers:

Need help?

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Apple LED Cinema Display 27 Specifications

General