Lenovo ThinkCentre M91p Hardware Maintenance Manual - Page 71

Miscellaneous error messages, Error code, POST error message, Description/Action, Message/Symptom

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Error code 1820 1962 POST error message More than one external fingerprint reader is attached. Power off and remove all but the reader that you set up within your main operating system. No operating system found. Press any key to repeat boot sequence. Description/Action If more than one external fingerprint reader is connected to a computer, this error message will be displayed to inform you to remove all of the fingerprint keyboards except the one compatible with the fingerprint application on your computer. This error occurs only after the POST is completed. Press any key to repeat boot sequence. Miscellaneous error messages Message/Symptom FRU/Action Changing display colors Display/Monitor Computer will not power-off. See "Power problems" on page 33. 1. Power Switch 2. System Board 3. Riser card, if installed Computer will not PXE 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 PXE 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 41) 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 "Power problems" on page 33. 1. AC/DC Power Adapter 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 Flashing cursor with an otherwise blank display. 1. System Board 2. Primary Hard Disk Drive 3. Hard Disk Drive Cable Chapter 7. Symptom-to-FRU index 65

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Error code
POST error message
Description/Action
1820
More than one external fingerprint
reader is attached. Power off and
remove all but the reader that you
set up within your main operating
system.
If more than one external fingerprint
reader is connected to a computer,
this error message will be displayed
to inform you to remove all of the
fingerprint keyboards except the
one compatible with the fingerprint
application on your computer.
1962
No operating system found. Press
any key to repeat boot sequence.
This error occurs only after the POST
is completed.
Press any key to repeat boot
sequence.
Miscellaneous error messages
Message/Symptom
FRU/Action
Changing display colors
Display/Monitor
Computer will
not
power-off. See “Power problems” on
page 33.
1. Power Switch
2. System Board
3. Riser card, if installed
Computer will
not
PXE 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 PXE
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 41)
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 “Power problems” on page 33.
1. AC/DC Power Adapter
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
Flashing cursor with an otherwise blank display.
1. System Board
2. Primary Hard Disk Drive
3. Hard Disk Drive Cable
Chapter 7
.
Symptom-to-FRU index
65