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Error code
POST error message
Description/Action
1820
More than one external fingerprint
reader are 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 are connected to a computer,
this error message will be displayed.
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.
Undetermined problems
This section provides instructions on how to find out the failing devices or adapters.
1. Power-off the computer.
2. Remove or disconnect the following components (if installed) one at a time.
a. External devices (modem, printer, or mouse)
b. Any adapters
c. Memory modules
d. Extended video memory
e. External Cache
f. External Cache RAM
g. Hard disk drive
h. Diskette drive
3. Power-on the computer to re-test the system.
4. Repeat steps 1 through 3 until you find the failing device or adapter.
If all devices and adapters have been removed, and the problem continues, replace the system board.
See “Replacing the system board” on page 124.
Beep symptoms
Beep symptoms are tones or a series of tones separated by pauses (intervals without sound) during POST.
The following table describes the beep symptoms.
Beep symptom
FRU/Action
2 short beeps
CMOS setting error
Common error code, see the detail failure information in
“POST error codes” on page 87.
3 short and 1 long beeps
DRAM memory error
Perform the following actions in order.
1. Make sure the memory module(s) are properly seated
in the connector(s).
2. Replace the memory module(s).
3. Replace the system board.
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ThinkCentre M73p Hardware Maintenance Manual
Summary of Contents for 10K9
Page 1: ...ThinkCentre M73p Hardware Maintenance Manual Machine Types 10K9 10KA 10KB and 10KC ...
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Page 21: ...1 2 Chapter 1 Read this first Important safety information 13 ...
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Page 27: ...1 2 Chapter 1 Read this first Important safety information 19 ...
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Page 151: ...Appendix D China Energy Label Copyright Lenovo 2015 143 ...
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