Lenovo 10K9, Hardware Maintenance Manual, Page: 95 / 158

Message/Symptom FRU/Action
Serial or parallel connector device failure (system board
connector) 1. External Device Self-Test OK?
2. External Device
3. Cable
4. System Board
Serial or parallel connector device failure (adapter
connector) 1. External Device Self-Test OK?
2. External Device
3. Cable
4. Alternate Adapter
5. System Board
Some or all keys on the keyboard do not work 1. Keyboard
2. Keyboard Cable
3. 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
• 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 be displayed next time you turn on the system.
Error code POST error message Description/Action
0135 Fan failure The system might be overheating.
Press F10 to exit.
Note: If the problem is caused by the
microprocessor fan, press F10 will
not solve the problem.
0211 Keyboard not found When there is no keyboard detected,
the error message will be displayed.
0164 Memory size decreased Press F10 to exit.
1762 Configuration change has occurred This error message is displayed when
a hard disk drive or optical drive
change has been made.
Press F10 to exit.
Chapter 8
.
Service checkout and symptom-to-FRU index
87