Apple MC408LL Apple Technician Guide - Page 25

Quick Check, Deep Dive, Symptom, Intermittent shutdown, Check, Result, Action

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- one of the current sensors reached a specified current limit, These shut downs are due to temperature, voltage, current, fan speed or other hardware related sensor values getting out of range, so the suggested steps for troubleshooting will be: - to check for all sensors connections and values using the latest available service utilities and Apple Service Diagnostics, - to check for fan(s) operation, - to check for cleanliness of the heatsink fins and the air flows, - to check for correct seating of the heatsink on logic board and presence of adequate thermal material. Quick Check Symptom Quick Check Intermittent shutdown • Powers off during startup • Powers off during desktop use 1. Collect details from customer on shutdown occurrence and system configuration when it happens (on startup, when running for a while, frequency of shutdowns, running applications, shutdown repeatability). If shutdown can be easily reproduced, check next steps: 2. Check AC cable connection with system 3. Reset SMC and PRAM 4. Start up with shift key down for safe mode check 5. Startup from known-good bootable device 6. Run latest available service utilities for sensors + thermal tests Deep Dive Check 1. Power related shutdown : Check with known-good AC cable. Verify if the shutdown issues disappear with known-good AC cable. Result Yes No Action Code Faulty user's AC cable. Replace X03 user's AC cable. Symptoms unchanged - Go to step 2 2010-08-03 Mac mini (Mid 2010) Symptom Charts - Startup and Power 25

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Mac mini (Mid 2010) Symptom Charts — Startup and Power
25
2010-08-03
- one of the current sensors reached a specified current limit,
These shut downs are due to temperature, voltage, current, fan speed or other hardware related
sensor values getting out of range, so the suggested steps for troubleshooting will be:
- to check for all sensors connections and values using the latest available service utilities and
Apple Service Diagnostics,
- to check for fan(s) operation,
- to check for cleanliness of the heatsink fins and the air flows,
- to check for correct seating of the heatsink on logic board and presence of adequate thermal
material.
Quick Check
Symptom
Quick Check
Intermittent shutdown
•
Powers off during startup
•
Powers off during desktop use
1.
Collect details from customer on shutdown
occurrence
and system configuration when it
happens (on startup, when running for a while,
frequency of shutdowns, running applications,
shutdown repeatability). If shutdown can be easily
reproduced, check next steps:
2.
Check AC cable connection with system
3.
Reset SMC and PRAM
4.
Start up with shift key down for safe mode check
5.
Startup from known-good bootable device
6.
Run latest available service utilities for sensors +
thermal tests
Deep Dive
Check
Result
Action
Code
1.
Power related shutdown :
Check with known-good AC
cable.
Verify if the shutdown issues
disappear with known-good
AC cable.
Yes
Faulty user’s AC cable. Replace
user’s AC cable.
X03
No
Symptoms unchanged - Go
to step 2