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Error code
1820
1962
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
2 short beeps CMOS setting error
3 short and 1 long beeps DRAM memory error
88
ThinkCentre M73p Hardware Maintenance Manual
POST error message
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.
No operating system found. Press
any key to repeat boot sequence.
FRU/Action
Common error code, see the detail failure information in
"POST error codes" on page 87.
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.
Description/Action
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.
This error occurs only after the POST
is completed.
Press any key to repeat boot
sequence.
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