Apple 2009 iMac - Page 47

iMac (21.5-inch, Late 2009) Symptom Charts — Display 47
2010-11-18
LCD Image Issues
Unlikely cause: power supply, hard drive, optical drive, fans, speakers, camera, microphone
Quick Check
Symptom Quick Check
LCD Issues
• Incorrect/missing colors
• Distorted/blurred image
• Pixel anomalies
• Vertical/horizontal lines
• Non-uniform brightness
1. Allow display to reach normal operating
temperature for about 15 minutes before
evaluating front-of-screen performance.
2. Check display preferences for use of custom
display prole.
3. Check brightness setting.
4. Clean glass panel while checking for dust/debris.
Deep Dive: General
Check Result Action Code
1. Verify if issue is incorrect/
missing colors.
Yes
Go to incorrect/missing
colors.
No Go to step 2.
2. Verify if issue is distorted/
blurred image.
Yes Go to distorted/blurred
image.
No Go to step 3.
3. Verify if issue is bright or dark
pixel anomalies.
Yes Go to pixel anomalies.
No Go to step 4.
4. Verify if issue is vertical or
horizontal lines.
Yes Go to vertical/horizontal
lines.
No Go to step 5.
5. Verify if issue is non-uniform
brightness.
Yes
Go to non-uniform
brightness.
No LCD functioning OK. Return to
appropriate symptom ow if
user issue is still present.