Lenovo 4228, 4223, 4229 manual Check power supply and signal cable connections

Message/Symptom

FRU/Action

Computer will not RPL from server

1. Ensure that network is in startup sequence as first

device or first device after diskette.

2.

Ensure that network adapter is enabled for RPL.

3.

Network adapter (Advise network administrator of

new MAC address)

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 37)

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)

7.

Replace system board

Dead computer. See “Hard disk drive boot error” on page

1. Power supply

49.

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 “Power Supply Problems” on page 49.

2.

Replace system board

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

Turn on indicator or hard disk drive in-use light not on, but

1. Power switch/LED assembly

computer works correctly

2.

System board