Pixel Anomalies

Unlikely cause: logic btoard, power supply, hard drive, optical drive, fans, speakers, camera, microphone

Quick Check

Symptoms

Quick Check

 

 

 

Pixel Anomalies

1.

Clean outside surface of glass panel.

Dark dot anomalies

2.

See kBase #HT1721: About LCD display pixel

Bright dot anomalies

 

anomalies.

Debris on inside surface of glass panel

Debris on surface of LCD panel

Deep Dive

Check

Result

Action

Code

 

 

 

 

 

1.

Determine if “defects” are dust/

Yes

Clean glass and/or LCD using

 

 

debris on surface of glass panel

 

procedures in Glass Panel

 

 

or LCD.

 

take-apart chapter.

 

 

 

 

 

 

 

 

No

Go to step 2.

 

 

 

 

 

 

2.

Determine if bright pixel

Yes

Replace LCD panel.

L08

 

defects exceed acceptable

 

Run Apple Service Display

 

 

number. See kBase #HT1721:

 

Utility to verify the resolution

 

 

About LCD display pixel

 

of issue.

 

 

anomalies.

 

Enter the resulting verification

 

 

 

 

code into the “Notes” field

 

 

 

 

of GSX and return system to

 

 

 

 

customer if repair is complete

 

 

 

 

 

 

 

 

No

LCD panel meets bright pixel

 

 

 

 

defect specifications.

 

 

 

 

Go to step 3.

 

 

 

 

 

 

3.

Determine if dark pixel defects

Yes

Replace LCD panel.

L08

 

exceed acceptable number. See

 

Run Apple Service Display

 

 

kBase #HT1721: About LCD

 

Utility to verify the resolution

 

 

display pixel anomalies.

 

of issue.

 

 

 

 

Enter the resulting verification

 

 

 

 

code into the “Notes” field

 

 

 

 

of GSX and return system to

 

 

 

 

customer if repair is complete

 

 

 

 

 

 

 

 

No

LCD panel meets dark pixel

 

 

 

 

defect specifications.

 

 

 

 

Go to step 4.

 

 

 

 

 

 

2010-09-09

iMac (27-inch, Mid 2010) Symptom Charts — Display  64

Page 64
Image 64
Apple MD094LL/A manual Pixel Anomalies