Apple LATE 2009 manual Symptoms Quick Check Corrupted Video

Corrupted Video

Unlikely cause: Adapter, hard drive, optical drive, fan, or speaker.

Quick Check

Symptoms	Quick Check
Corrupted Video	1.	Set System Preferences/Display LCD panel to
• Text and graphics appear fuzzy		native resolution. Non-native resolutions are
• Image corrupted		unable to produce optimal clarity.
	2.	Make sure all relevant software updates have
		been applied. Graphics driver updates may be
		included with software updates.
	3.	When the issue occurs take a screenshot of the
		display (Command-Shift-3). View the screen shot
		file on another known-good computer. If the
		image corruption can be seen in the screenshot
		then the issue is with the video drivers, software,
		or video/logic board. If the issue cannot be seen
		in the screenshot then the display and cable
		should be tested further.
	4.	Boot from install DVD or another known-good
		volume to determine whether a potential
		software/driver issue exists.
	5.	Go to Deep Dive.

Deep Dive

Check		Result	Action	Code
1.	Boot from Install DVD and	Yes	Go to step 2.
	verify whether issue is still
		No	Issue likely caused by
	visible.
			software or driver issue.
			Troubleshoot for software
			issues. Make sure all software
			updates have been installed.
2.	Verify whether issue is visible	Yes	Issue is isolated to one type of
	on an external display attached		display port. Go to step 3.
	to the DisplayPort or Mini-
	DVI. Does the issue appear on
		No	Go to step 5.
	“other” display port?

2009-11-03 Mac mini (Late 2009) Symptom Charts — Startup and Power  27