Apple A1267 Specifications download pdf (Page 25)

LED Cinema Display (24-inch) Symptom Charts — Display Issues 25

2010-02-08

Verify display’s USB hub and 2.

built-in camera are listed

in the System Proler’s USB

device tree is not disappearing

intermittently (refresh System

Proler to observe).

Yes Power supply OK.

Go to step 3.

No

Go to Dead Unit/No Power

symptom code ow.

Unplug and replug the 3.

Mini DisplayPort and USB

connectors 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 If connections are secure and

display still shows unstable

ickering, go to step 4.

No Reseat connectors and retest.

Verify all connections between 4.

power supply, all-in-one cable,

LCD, and logic board are secure.

See Functional Overview.

Yes If connections are secure and

the display is still unstable

ickering, go to step 5.

No Reseat connectors and retest.

Disconnect all-in-one cable 5.

and LCD function interface

cable from logic board and

system. Verify connectors and

cable under magnication for

pinched cables and damaged/

bent pins.

Yes

If cable is damaged,

replace all-in-one cable or

replace LCD function

interface cable.

L14

No Go to step 6.

Disconnect LED driver cable 6.

from logic board. Verify

connectors and cable under

magnication for pinched cable

and damaged or bent pins.

Yes

Damaged LED driver cable.

Replace LCD panel.

L14

No Go to step 7.

Shine bright (low heat) 7.

ashlight into the front of the

LCD. Verify if an image is being

displayed during ickering.

Yes

Image present but backlight

is ickering.

Replace logic board.

L06

No

Replace LCD panel. L06

Verify the source of the noise 8.

is the electrical as opposed to

mechanical

Yes Noises that are not audible

from the normal user position

are considered acceptable.

No

Noise from another source.

Go to Noise, Hum, Vibration

symptom code ow.

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