Lenovo ThinkCentre A55, Hardware Maintenance Manual

Page: 81 / 210

Beep symptoms
Beep symptoms are tones or a series of tones separated by pauses (intervals
without sound) during POST.
The following table describes beep symptoms.
Beep Symptom FRU/Action
2 short beeps
CMOS setting error
Perform the following actions in order.
1. Start the Setup Utility program and press
F10 to Save and exit. See Chapter 6,
“Using the Setup Utility,” on page 49.
2. Start the Setup Utility program and press
F7 to load defaults and then press F10 to
Save and exit.
3. Perform a Boot block recovery. See
“Recovering from a POST/BIOS update
failure” on page 198.
1 long and 2 short beeps
Monitor or video adapter card error
Perform the following actions in order.
1. Make sure the monitor is properly
connected to the computer.
2. Replace the video adapter card (if
present).
3. Replace the system board.
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 6, “Using the
Setup Utility,” on page 49.
2. Perform a Boot block recovery. See
“Recovering from a POST/BIOS update
failure” on page 198.
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.
Chapter 7. Symptom-to-FRU Index
75