Lenovo 1010, 992, 981, 1008 manual POST error codes

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 “Configuring 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-OnSelf-Test, or POST. POST does the following operations.

•Checks some basic system-board operations

•Checks the memory operation

•Starts the video operation

•Verifies 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 first 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 configuration 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