Distorted/Blurred Image

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

Quick Check

Symptoms

Quick Check

 

 

 

Distorted/Blurred Image

1.

If display flicker only occurs when the brightness

• Text and graphics appear fuzzy

 

level is set below maximum, then jump to topic,

• Image corrupted

 

Display: Backlight Issue / No Backlight.”

 

 

 

2.

Run Automatic Software Update to verify that all

 

 

available firmware and software updates have

 

 

been applied.

 

3.

Verify Mac OS X version installed is the build

 

 

version supported on the hardware. Make sure

 

 

customer didn’t migrate over old version of Mac

 

 

OS X.

 

4.

Set System Preferences > Displays to native

 

 

resolution of LCD. Non-native resolutions are

 

 

unable to produce optimal clarity.

 

5.

Clean outside of glass panel.

 

6.

Boot from install DVD to determine if a potential

 

 

software issue exists.

 

 

 

Deep Dive

Check

Result

Action

Code

 

 

 

 

1. Verify if user issue is due to

Yes

Flickering issue, go to Noise /

 

flickering, or to an unstable

 

Unstable Flickering.

 

video image on the LCD.

 

 

 

No

Go to step 2. All other issues

 

 

 

 

 

go to appropriate symptom

 

 

 

flow.

 

 

 

 

 

2. Boot from Install DVD and

Yes

Go to step 3.

 

verify if issue is still visible.

 

 

 

No

Verify Mac OS X version

 

 

 

 

 

installed is the build version

 

 

 

supported on the hardware.

 

 

 

Make sure customer didn’t

 

 

 

migrate over old version

 

 

 

of Mac OS X. Make sure

 

 

 

all software and firmware

 

 

 

updates have been installed.

 

 

 

 

 

2010-09-09

iMac (27-inch, Mid 2010) Symptom Charts — Display  62

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Image 62
Apple MD094LL/A Symptoms Quick Check Distorted/Blurred Image, Clean outside of glass panel, Software issue exists