Question about Apple 22" Cinema Display Monitor
When I press the power button, a white light comes on and then goes off again in a couple of seconds. I'm using an Apple DVI to ADC adapter. Is the power adapter bad, or is it a monitor problem?
It's a model M8149 22" Apple Cinema Display.
This may be an issue with the display detecting the wrong video format or is using an unsupported resolution for this Apple Cinema Display 22"
• Make sure your Mac is turned off.
• Once your Mac is shutdown, you will need to perform what is called a PRAM reset (Parameter RAM)
• Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously .
• Turn on the computer.
• Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
• Now, hold the keys down until the computer restarts and you hear the start up sound for the third time.
• Release the keys and allow the Mac to start up.
If that does not help here is additional support reference from Apple regarding its LCD displays:
Apple Support Link:
Power Light Flash Issues
Let me know if this helps!
Posted on Jan 31, 2010
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Posted on Jan 02, 2017
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