Post Beep Codes - Lenovo ThinkCentre A51 Quick Reference Manual

POST beep codes

Another way for POST to notify you of errors is through a series of audible
beeps. A beep pattern represents a numeric value and provides further
information about the location of a potential problem.
The following are the most common POST beep codes that you might hear
when starting your computer.
Beep pattern
1 long and 2 short
beeps
1 long beep followed
by a series of short
beeps
2 short beeps
1 short - 3 short - 3
short - 1 short
Here are some general guidelines for working with POST beep codes:
v Record any beep patterns that you hear. If you call for service, you will be
asked for the beep patterns.
v If the beep pattern is not in this book, more in-depth troubleshooting is
required.
– If the operating system starts when you turn on your computer, use
Access IBM to learn how to run diagnostics and see the entire online
troubleshooting procedures.
– If the operating system will not start, have the computer serviced.
Description
No on-screen message. Beeps
occur before video
initialization.
External ROM failure (such as
VGA)
A POST error occurred.
No memory or no
configuration memory
Action
Remove and reinstall the dual
inline memory modules
(DIMMs).
If the problem persists, have the
computer serviced.
If the problem persists, have the
computer serviced.
If you have changed the
hardware configuration, go into
the Setup Utility and exit to save
setting. Otherwise refer to error
code section to resolve error.
Reinstall the memory.
If problem persists, replace the
memory.
Chapter 5. Troubleshooting and diagnostics
29