Post Beep Codes - Lenovo ThinkCentre A35 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 short
2 short
1 long 1 short
1 long 2 short
1 long 3 short
1 long 9 short
Continuous long beeps
Continuous short beeps
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 will not start, have the computer serviced.
22
Quick Reference
Description
System boots successfully
CMOS setting error
DRAM or M/B error
Monitor or display card error
Keyboard error
BIOS ROM error
DRAM error
Power error