Lenovo 5068, 7567, 7558 manual Check power supply and signal cable connections

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 53)
	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	1. Power Supply
57.	2.	System Board
Diskette drive in-use light remains on or does not light	1. Diskette Drive
when drive is active.	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	1. System Board
diagnostics diskette in the first 3.5-inch diskette drive.	2.	Diskette Drive Cable
	3.	Network Adapter
Intensity or color varies from left to right of characters	1.	Display
and color bars	2.	Video adapter (if present)
	3.	System Board
No power or fan not running	1. See “Hard disk drive boot error” on page 57.
Non-system disk or disk error-type message with a	1. Diskette Drive
known-good diagnostic diskette.	2.	System Board
	3.	Diskette Drive Cable
Other display symptoms not listed above (including blank	1. Display
or illegible display)	2.	System Board
Power-on indicator or hard disk drive in-use light not on,	1. Power switch/LED assembly
but computer works correctly	2.	System Board
Printer problems	1.	Printer
	2.	System Board

Chapter 7. Symptom-to-FRU Index 77