System information

Mac mini (Mid 2011) Symptom Charts — Startup and Power 24
2011-07-21
8. Disconnect the power supply
cable from logic board ,
reconnect AC power cord and
use a multimeter to verify that
a 12 Volts voltage is present
between the two outer pins
of cable. See Apple Technical
article http://support.apple.
com/kb/HT3250 for details on
using a digital multi-meter
Yes Power supply is present.
Replace logic board and
retest.
M01
No Replace cable between power
supply and logic board and
retest.
If issue persists after cable
was replaced, replace power
supply and retest.
X03
P01
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 OS by starting up from known-good
original system media or an up-to-date, bootable
OS X volume like :
-the same Mac mini model connected and setup
in Target Disk Mode,
-a compatible known-good up-to date Mac OS X
installed on an external drive,
-by pressing the Cmd-R keyboard keys while
restarting, to access the Mac OS X Utilities
available from Recovery HD.
Note: The computer may need to be connected
to a network with Internet access.
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 Apple Technical 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
Apple Technical article
http://support.apple.com/kb/HT2341
5. Identifying when in the startup process the
computer hangs can help isolate the issue.
See Apple Technical article
http://support.apple.com/kb/HT2674
for information on the Mac startup sequence,
error codes and symbols used.