Lenovo ThinkPad L450, User Manual

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• Message : 2200: Machine Type and Serial Number are invalid.
Solution : Machine Type and Serial Number are invalid. Have the computer serviced.
• Message : 2201: Machine UUID is invalid.
Solution : Machine UUID is invalid. Have the computer serviced.
• Message : Fan error
Solution : Cooling fan has failed. Shut down the computer immediately and have the computer serviced.
• Message : Thermal sensing error
Solution : The thermal sensor is not functioning correctly. Shut down the computer immediately and
have the computer serviced.
• Message : This system does not support batteries that are not genuine Lenovo-made or authorized. The
system will continue to boot, but may not charge unauthorized batteries. Press the ESC key to continue.
Attention : Lenovo has no responsibility for the performance or safety of unauthorized batteries, and
provides no warranties for failures or damage arising out of their use.
Solution : Replace the battery with the correct Lenovo battery for this computer. If you still see the same
error message, contact Lenovo service to have the computer serviced.
• Message : The battery installed is not supported by this system and will not charge. Please replace the
battery with the correct Lenovo battery for this system. Press the ESC key to continue.
Solution : Replace the battery with the correct Lenovo battery for this computer. If you still see the same
error message, contact Lenovo service to have the computer serviced.
Errors without messages
• Problem : My screen keeps blanking when I do not want it to.
Solution :
– If your computer is preinstalled with the Windows 7 operating system, you can disable any system
timers, such as the LCD turn-off timer or the blank timer by doing the following:
1. Start Power Manager.
2. Click the Power plan tab, and then select Maximum Performance from the predefined power
plans.
– If your computer is preinstalled with the Windows 8.1 operating system, doing the following:
1. Go the desktop and click the battery-status icon in the windows notification area.
2. Click More power options ➙ Show additional plans ➙ High performance .
• Problem : When I turn on the computer, nothing is displayed on the screen and the computer does not
beep while starting up.
Note: If you are not sure whether you heard any beeps, turn off the computer by pressing and holding the
power button for four seconds or more. Then turn on the computer and listen again.
Solution : Ensure that:
– The battery is installed correctly.
– The ac power adapter is connected to the computer and the power cord is plugged into a working
electrical outlet.
– The computer is turned on. (Press the power button again for confirmation.)
– The brightness level of the screen is appropriately set.
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User Guide