Lenovo C205 All-In-One User Manual download pdf (Page 24)

Hardware Maintenance Manual

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motherboardoperations

• Checksthememoryoperation

• Startsthevideooperation

• Veries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 Date/Time Not Set The CMOS Date and/or Time are

invalid. This error can be resolved

by readjusting the system time in

Phenix BIOS Setup.

CMOS Checksum Bad 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.

Primary Master Hard Disk Error The IDE/ATAPI device conﬁgured as

Primary Master/Secondary Master

could not be found or initialized.

Make sure the hard disk drive is

correctly installed.

Secondary Master Hard Disk Error

Keyboard error 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

keyboardless operation in Setup to

Enable. The BIOS then ignores the

missing keyboard during POST.

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Lenovo C205 All-In-One User Manual Page 24