Won’t start up, Won’t start up 20, Symptom flow – Apple Mac mini Late 2009 (Technician Guide) User Manual
Page 20
Mac mini (Late 2009) Symptom Charts — Startup and Power
20
2009-11-03
Won’t Start Up
Quick Check
Symptoms
Quick Check
Won’t Start Up
No startup chime
•
Error tones during startup.
•
Grey screen with fan noise, or
•
other noise.
Will not progress beyond
•
Apple logo or spinning gear.
Isolate OS by starting up from original install
1.
media for the computer, the same make and
model computer in Target Disk Mode, or
compatible known-good OS on an external drive.
Both AirPort and Bluetooth services are available
when booted from the Install disk.
Reset SMC and PRAM to clear any stored,
2.
corrupted information.
Start up in Safe Mode by holding the shift key
3.
down during startup to load only required kernel
extensions and disable all startup and login
items. See KBase article
If system generates error tones there may be an
4.
issue with the SDRAM. See KBase article
Identifying when in the startup process the
5.
computer hangs can help isolate the issue.
See KBase article
for information on the Macintosh startup
sequence, error codes and symbols used.
Deep Dive
Check
Result
Action
Code
Boot the computer to Apple
1.
Hardware Test on the Install
DVD. Does the computer boot
up to this volume?
Yes
Run the extended tests
and proceed with results. If
AHT passes or boots with a
memory error, go to step 2.
No
Go to step 2.
Remove the installed SDRAM,
2.
and test with known-good
SDRAM. Does the computer
startup properly now?
Yes
SDRAM issue. Replace SDRAM.
Issue resolved.
X02
No
Go to step 3.