Specifications

LED Cinema Display (24-inch) Symptom Charts — Startup and Power Issues 17
2010-02-08
Symptom Charts
Follow steps in the order indicated below. If an action resolves the issue, retest system to verify.
Note: A compilation of Quick Check tables is available at:
http://service.info.apple.com/QRS/en/quickreference.pdf
Startup and Power Issues
Dead Unit / No Power
Unlikely cause: LCD panel, blower, subwoofer, speakers, camera, microphone
Quick Check
Symptoms Quick Check
Dead Unit / No Power
No power•
No image•
No fan spin•
Non-operational•
Verify power source.1.
Verify USB/display/power connectors are fully 2.
seated.
Verify display is used with supported system.3.
Use with known-good system. 4.
If used as second display, check display
preferences to see if display is recognized.
Check brightness setting.5.
Deep Dive
Check Result Action Code
Verify display’s USB hub and 1.
built-in camera are listed in the
System Proler’s USB device
tree.
Yes
Power supply OK. Go to
Blank/No Video symptom
code ow.
No Go to step 2.