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Beep Symptom FRU/Action
1 long and 3 short beeps Keyboard error
Perform the following actions in order.
1. Make sure the keyboard is properly connected to the
keyboard connector.
2. Replace the keyboard.
3. Replace the system board.
1 long and 9 short beeps BIOS ROM error
Perform the following actions in order.
1. Start the Setup Utility program and press F7 to load
defaults and then press F10 to Save and exit. See
Chapter 8 “Conguring the server” on page 77
.
2. Perform a Boot block recovery. See “Recovering
from a POST/UEFI update failure” on page 83.
3. Replace the system board.
Continuos 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.
POST error codes
Each time you power-on the system, it performs a series of tests that check the operation of the system
and some options. This series of tests is called the Power-On Self-Test, or POST. POST does the following
operations.
• Checks some basic system-board operations
• Checks the memory operation
• Starts the video operation
• Veries that the boot drive is working
If the POST detects a problem, an error message appears on the screen. A single problem can cause several
error messages to appear. When you correct the cause of the rst error message, the other error messages
probably will not appear on the screen the next time you turn on the system.
POST Error Message Description/Action
CMOS battery failed The CMOS battery is no longer functional.
Replace the battery.
CMOS checksum error - defaults loaded Checksum of CMOS is incorrect.
The computer loads the default conguration settings.
This error might indicate that CMOS has become corrupt
due to a weak CMOS battery.
CPU at nnnn
nnnn is the running speed of the microprocessor.
Press Esc to skip memory test
Pressing Esc skips the full memory test
Chapter 4. Diagnostics 17