Apple A1267 Specifications download pdf (Page 23)

LED Cinema Display (24-inch) Symptom Charts — Display Issues 23

2010-02-08

Display Issues

Blank / No Video, No Backlight

Unlikely cause: power supply, blower, subwoofer, speakers, camera, microphone

Quick Check

Symptoms Quick Check

Blank / No Video, No Backlight

No video•

No backlight•

Dim backlight•

Verify display being used with supported system.1.

Verify USB/display/power connectors are fully 2.

seated.

Use with known-good system. If used as second 3.

display, check display preferences to see if display

is recognized by system.

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 and USB

communication OK.

Go to step 3.

No Go to step 2.

Unplug and replug the Mini 2.

DisplayPort connector into

a known-good, 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 Display detected by system.

Go to step 3.

Go to Dead Unit/No Power

symptom code ow.

Darken room and connect to a 3.

known-good supported system.

Verify backlight by looking for

faint glow from display.

Yes Video signal from host system

OK. Backlight ON.

Go to step 5.

No Go to step 4.

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Apple A1267 Specifications Page 23

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