Errors Without Messages - Lenovo ThinkPad L420 User Manual

Error Beep symptom
code
0254 Two short beeps
0260 Two short beeps
0270 Two short beeps
0271 Two short beeps
0280 Two short beeps
02D0 Two short beeps
02D2 Two short beeps
none
02F0
1802 Two short beeps
1804 Two short beeps
none
Two short beeps
none
2200
none
2201

Errors without messages

• Problem: My screen keeps blanking when I do not want it to.
Solution: You can disable any system timers, such as the LCD turn-off timer or the blank timer.
For Windows 7 and Windows Vista:
– Start Power Manager. Switch to Advanced view.
– Click the Power plan tab, and then select Maximum Performance from the predefined power plans.
For Windows XP:
Error message
0254: System NV7 Volume
checksum bad - Default
configuration used
0260: System timer error
0270: Real time clock error
0271: Check date and time
settings
0280: Previous boot incomplete -
Default configuration used
02D0: System cache error - Cache
disabled
CPU Variable MTRR configure
failed.
02F0: CPU ID:
1802: Unauthorized network card
is plugged in - Power off and
remove the miniPCI network card.
Unauthorized WAN card is
plugged in - Power off and remove
the WAN card.
System Configuration Data Read
Error
2200: Machine Type and Serial
Number are invalid.
2201: Machine UUID is invalid.
Chapter 10
Solution
Power off to discharge CMOS, and
then restart your computer.
Have the computer serviced.
Have the computer serviced.
Press F1 to enter into the BIOS
Setup menu, press F9 to load the
defult settings, press F10 to exit
and restart your computer.
Load default settings in BIOS
Setup Utility.
If you still see the same error
message, have the computer
serviced.
The cache is disabled. Have the
computer serviced.
Have the computer serviced
Invalid CPU is installed. Install
correct CPU.
If you still see the same error
message, have the computer
serviced.
Power off your computer and
remove the PCI Express Mini Card.
Power off and remove the WAN
card.
Press F1 to enter the BIOS Setup
menu. Press F9 to load the default
settings. Press F10 to exit. Restart
the computer.
Machine Type and Serial Number
are invalid. Have the computer
serviced
Machine UUID is invalid. Have the
computer serviced.
.
Troubleshooting computer problems
161