Post Beep Codes - Lenovo ThinkCentre A30 Quick Reference Manual

Code Description
1762 A change in configuration
occurred.
1962 No operating system found or
no device in the startup
sequence has a valid boot
record.
5962 A change in configuration
occurred.
8603 Pointing device error
No mouse was detected.

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.
20
Quick Reference
Action
A hard disk drive has been added or
removed.
v Restore the original hardware.
Or
v Accept the new configuration using
the IBM Setup Utility.
If you cannot correct the problem,
have the computer serviced.
Change the startup sequence using
the IBM Setup Utility.
If you cannot correct the problem,
have the computer serviced.
An ATAPI device has been added or
removed.
v Restore the original hardware.
Or
v Accept the new configuration using
the IBM Setup Utility.
If you cannot correct the problem,
have the computer serviced.
v Install a mouse.
Or
v Set the mouse option correctly
using the IBM Setup Utility.
If you cannot correct the problem,
have the computer serviced.