Apple MC408LL Apple Technician Guide - Page 20

card, Hard Drive, Optical Drive, Disconnect AirPort/Bluetooth

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6. Disconnect power button Yes Replace Power Button X03 connector from logic board and assembly short the two power button connector pins on logic board. No Go to step 7 Verify if the unit powers on. 7. Disconnect AirPort/Bluetooth card, Hard Drive, Optical Drive and LED/IR Sensor cables from logic board. Connect AC cable and press the power button to verify if a startup error tone is heard. Yes Reconnect one by one each X03 device and retest to identify the shorting one. When found, replace affected device cable first, and retest. No Go to step 8 8. Disconnect the power supply cable from logic board , connect AC cable and use a multimeter to verify that a 12 Volts voltage is present between the two outer pins of cable. See KBase article http://support.apple.com/kb/ HT3250 for details on using a digital multi-meter Yes Power supply is present. M01 Replace logic board and retest. No Replace cable between power X03 supply and logic board and retest. If issue persists after cable P01 was replaced, replace power supply and retest. 2010-08-03 Mac mini (Mid 2010) Symptom Charts - Startup and Power 20

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Mac mini (Mid 2010) Symptom Charts — Startup and Power
20
2010-08-03
6.
Disconnect power button
connector from logic board and
short the two power button
connector pins on logic board.
Verify if the unit powers on.
Yes
Replace Power Button
assembly
X03
No
Go to step 7
7.
Disconnect AirPort/Bluetooth
card, Hard Drive, Optical Drive
and LED/IR Sensor cables from
logic board. Connect AC cable
and press the power button to
verify if
a startup error tone is
heard.
Yes
Reconnect one by one each
device and retest to identify
the shorting one. When
found, replace affected device
cable first, and retest.
X03
No
Go to step 8
8.
Disconnect the power supply
cable from logic board ,
connect AC cable and use
a multimeter to verify that
a 12 Volts voltage is present
between the two outer pins
of cable. See KBase article
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