Apple MC408LL Apple Technician Guide - Page 21

Won’t Start Up, Quick Check - a pram battery

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Won't Start Up Quick Check Symptoms 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. Quick Check 1. Isolate by starting up from : -the original install DVD media inserted in Mac mini optical drive or in the optical drive of another computer set up in FireWire Target Disk Mode , -from the same Mac mini model setup in FireWire Target Disk Mode, -from a compatible known-good OS on an external drive. Note that both AirPort and Bluetooth services are available when booted from the Mac mini Install DVD. 2. Reset SMC and PRAM to clear any stored, corrupted information. 3. Start up in Safe Mode by holding the shift key down during startup to load only required kernel extensions and disable all startup and login items. See KBase article http://support.apple.com/kb/HT1564 4. If system generates error tones there may be an issue with the SDRAM or backup battery. See KBase article http://support.apple.com/kb/HT2341 5. Identifying when in the startup process the computer hangs can help isolate the issue. See KBase article http://support.apple.com/kb/HT2674 for information on the Macintosh startup sequence, error codes and symbols used. 2010-08-03 Mac mini (Mid 2010) Symptom Charts - Startup and Power 21

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Mac mini (Mid 2010) Symptom Charts — Startup and Power
21
2010-08-03
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.
1.
Isolate by starting up from :
-the original install DVD media inserted in Mac
mini optical drive or
in the optical drive of
another computer set up in FireWire Target Disk
Mode ,
-from the same Mac mini model setup in FireWire
Target Disk Mode,
-from a compatible known-good OS on an
external drive.
Note that both AirPort and Bluetooth services are
available when booted from the Mac mini Install
DVD.
2.
Reset SMC and PRAM to clear any stored,
corrupted information.
3.
Start up in Safe Mode by holding the shift key
down during startup to load only required kernel
extensions and disable all startup and login
items. See KBase article
4.
If system generates error tones there may be an
issue with the SDRAM or backup battery. See
KBase article
5.
Identifying when in the startup process the
computer hangs can help isolate the issue.
See KBase article
for information on the Macintosh startup
sequence, error codes and symbols used.