Apple A1267 Specifications download pdf (Page 21)

LED Cinema Display (24-inch) Symptom Charts — Startup and Power Issues 21

2010-02-08

Sleep/Wake Issue

Unlikely cause: LCD panel, blower, subwoofer, speakers, camera, microphone

Quick Check

Symptoms Quick Check

Sleep/Wake Issue

Won’t go to sleep or wake up •

from sleep

Verify display is being used with supported 1.

system.

Use with known-good system. If used as second 2.

display, check display preferences to see if display

is recognized by system.

Verify USB/display/power connectors are fully 3.

seated.

Check brightness setting.4.

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 step 3.

No Go to step 2.

Verify voltage on logic 2.

board between J0121 Pin 1

(24.5VDC) and Pin 3 (GND) is

23.3–25.7 VDC.

Yes Power supply OK.

Go to step 3.

No No power at logic board.

Go to step 4.

Unplug and replug the Mini 3.

DisplayPort connector into

a supported powered-up

portable system and monitor

the portable’s display. Verify

that the portable’s display

briey turns o then back on.

Yes Logic board OK.

Go to step 6.

No Go to step 4.

Verify all connections between 4.

power supply, all-in-one cable,

and logic board are secure. See

Functional Overview.

Yes If connections are secure and

display still does not function

correctly, go to step 5.

No Reseat connectors and retest.

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Apple A1267 Specifications Page 21

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