![]() ![]() Solution: Make sure that: - The battery is installed correctly. Then turn on the computer and listen again. 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. Problem: When I turn on the computer, nothing is displayed on the screen and the computer does not beep while starting up.Click the Power plan tab, and then select Maximum Performance from the predefined power plans. Solution: If you 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. Problem: My screen keeps blanking when I do not want it to.Turn off the computer immediately and have the computer serviced. Message: Thermal sensing error Solution: The thermal sensor is not functioning correctly. ![]() Message: Fan error Solution: Cooling fan has failed.Message: 2201: Machine UUID is invalid.Solution: Machine Type and Serial Number are invalid. Message: 2200: Machine Type and Serial Number are invalid. ![]()
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