Apple MC408LL Apple Technician Guide - Page 27

Replace Thermal module, it if available as a standalone

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5. Verify if a thermal sensor or fan failure is reported by latest available service diagnostics. Yes - If a fan failure is reported, check for fan cable seating and retest. If same failure happens when retesting, replace fan with known-good one and retest. If issue does not happen anymore with the known-good fan, replace X22 user's fan. - If a thermal failure is reported, check for cause of excessive temperature, (like clogged fan, disconnected sensor cable, obstructed vent, dust in heatsink fin) and retest. If still failing locate affected sensor and replace it if available as a standalone X03 part, or replace part where sensor is integrated (logic board, power supply, M23 heatsink) according to the P17 sensor location table . Go to X10 step 6 No Replace Thermal module X10 Go to step 6 6. Isolate if issue solved. Yes Issue fixed Verify if shutdown/issue does not happen anymore after part No Replace logic board with exchange. corresponding symptom: -if for thermal error cause M18 -if for other cause M08 2010-08-03 Mac mini (Mid 2010) Symptom Charts - Startup and Power 27

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Mac mini (Mid 2010) Symptom Charts — Startup and Power
27
2010-08-03
5.
Verify if a thermal sensor or
fan failure is reported by latest
available service diagnostics.
Yes
- If a fan failure is reported,
check for fan cable seating
and retest. If same failure
happens when retesting,
replace fan with known-good
one and retest. If issue does
not happen anymore with
the known-good fan, replace
user’s fan.
- If a thermal failure is
reported, check for cause of
excessive temperature, (like
clogged fan, disconnected
sensor cable, obstructed
vent, dust in heatsink fin) and
retest. If still failing locate
affected sensor and replace
it if available as a standalone
part, or replace part where
sensor is integrated (logic
board, power supply,
heatsink) according to the
sensor location table . Go to
step 6
X22
X03
M23
P17
X10
No
Replace Thermal module
Go to step 6
X10
6.
Isolate if issue solved.
Verify if shutdown/issue does
not happen anymore after part
exchange.
Yes
Issue fixed
No
Replace logic board with
corresponding symptom:
-if for thermal error cause
-if for other cause
M18
M08