Apple MD094LL/A 用户手册
iMac (27-inch, Mid 2010) Symptom Charts — Startup and Power
48
2010-09-09
Corrupted Video
Unlikely cause: power supply, hard drive, optical drive, fans, speakers, camera, microphone
Quick Check
Symptoms
Quick Check
Corrupted Video
• Text and graphics appear fuzzy
• Image corrupted
• Text and graphics appear fuzzy
• Image corrupted
1. Using the KBase article http://support.apple.com/
kb/HT1159 , verify Mac OS X version installed is
the build number supported on the hardware.
Make sure customer didn’t migrate over their old
version of Mac OS.
2. Set System Preferences > Displays to native
resolution of LCD. Non-native resolutions are
unable to produce optimal clarity.
3. Clean outside surface of glass panel..
4. Make sure all relevant firmware and software
4. Make sure all relevant firmware and software
updates have been applied. Graphics driver
updates may be included with software updates.
5. Boot from install DVD or another known-good
volume to determine whether a potential
software/driver issue exists.
6. When issue occurs, take a screenshot of the
display (Command-Shift-3). View screenshot file
on a known-good computer. If image corruption
can be seen in the screenshot then issue is with
the video drivers, software, or video/logic board.
If issue cannot be seen in the screenshot then
LCD panel and DisplayPort cable should be tested
further.