Lenovo 7522, 7721, 7715, 7774, 7706, 7719 Post error codes, Post Error Message Description/Action

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.

vChecks some basic system-board operations

vChecks the memory operation

vStarts the video operation

vVerifies 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
HARD DISK INSTALL FAILURE	Cannot find or initialize the hard disk drive
	controller or the drive.
	Make sure the hard disk drive is correctly
	installed.
	If no hard disk drives are installed, make
	sure the hard disk drive selection in Setup is
	set to NONE.
Keyboard error or no keyboard present	Cannot initialize the keyboard.
	Make sure the keyboard is properly
	connected to the computer and that no keys
	are held pressed during POST.
	To purposely configure the computer
	without a keyboard, set the error halt
	condition in Setup to HALT ON ALL, BUT
	KEYBOARD. The BIOS then ignores the
	missing keyboard during POST.
Memory Test:	This message displays during a full memory
	test, counting down the memory areas being
	tested.
Memory test fail	If POST detects an error during memory
	testing, additional information appears. This
	information gives specifics about the type
	and location of the memory error.

Chapter 7. Symptom-to-FRU index 77