Message/Symptom
FRU/Action
Computer will
not
perform a Wake On LAN
®
(if applicable)
1. Check power supply and signal cable connections
to network adapter.
2. Ensure that the operating system settings are set to
enable Wake on LAN.
3. Ensure Wake On LAN feature is enabled in
Setup/Configuration (see “Starting the Setup Utility
program” on page 63)
4. Ensure network administrator is using correct MAC
address.
5. Ensure no interrupt or I/O address conflicts.
6. Network adapter (advise network administrator of
new MAC address)
Dead computer. See “Hard disk drive boot error” on page
92.
1. Power Supply
2. System Board
Diskette drive in-use light remains on or does not light
when drive is active.
1. Diskette Drive
2. System Board
3. Diskette Drive Cable
Blank screen except for flashing cursor.
1. System Board
2. Primary Hard Disk Drive
3. Hard Disk Drive Cable
Incorrect memory size during POST
1. Run the Memory tests.
2. Memory Module
3. System Board
"Insert a Diskette" icon appears with a known-good
diagnostics diskette in the first 3.5-inch diskette drive.
1. System Board
2. Diskette Drive Cable
3. Network Adapter
Intensity or color varies from left to right of characters
and color bars
1. Display
2. Video adapter (if present)
3. System Board
No power or fan not running
1. See “Hard disk drive boot error” on page 92.
Non-system disk or disk error-type message with a
known-good diagnostic diskette.
1. Diskette Drive
2. System Board
3. Diskette Drive Cable
Other display symptoms not listed above (including blank
or illegible display)
1. Display
2. System Board
Power-on indicator or hard disk drive in-use light not on,
but computer works correctly
1. Power switch/LED assembly
2. System Board
Printer problems
1. Printer
2. System Board
Chapter 9
.
Service checkout and symptom-to-FRU index
95
Summary of Contents for ThinkCentre M79
Page 1: ...ThinkCentre M79 Hardware Maintenance Manual Machine Types 10CT 10CU 10CV and 10CW ...
Page 6: ...iv ThinkCentre M79 Hardware Maintenance Manual ...
Page 8: ...vi ThinkCentre M79 Hardware Maintenance Manual ...
Page 16: ... 18 kg 37 lb 32 kg 70 5 lb 55 kg 121 2 lb 8 ThinkCentre M79 Hardware Maintenance Manual ...
Page 19: ...1 2 Chapter 1 Read this first Important safety information 11 ...
Page 20: ...1 2 12 ThinkCentre M79 Hardware Maintenance Manual ...
Page 21: ...Chapter 1 Read this first Important safety information 13 ...
Page 27: ...Chapter 1 Read this first Important safety information 19 ...
Page 31: ...Chapter 1 Read this first Important safety information 23 ...
Page 40: ...Figure 4 Component locations 32 ThinkCentre M79 Hardware Maintenance Manual ...
Page 68: ...Figure 8 Installing a padlock 60 ThinkCentre M79 Hardware Maintenance Manual ...
Page 80: ...72 ThinkCentre M79 Hardware Maintenance Manual ...
Page 98: ...90 ThinkCentre M79 Hardware Maintenance Manual ...
Page 112: ...104 ThinkCentre M79 Hardware Maintenance Manual ...
Page 168: ...160 ThinkCentre M79 Hardware Maintenance Manual ...
Page 172: ...164 ThinkCentre M79 Hardware Maintenance Manual ...
Page 175: ...Appendix D China Energy Label Copyright Lenovo 2014 167 ...
Page 176: ...168 ThinkCentre M79 Hardware Maintenance Manual ...
Page 178: ...170 ThinkCentre M79 Hardware Maintenance Manual ...
Page 184: ...176 ThinkCentre M79 Hardware Maintenance Manual ...
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