If you wish to reset your PC's operating system back to factory, please reference Windows 8 features to reset to factory, or for XP, Vista, or Windows 7 clients, please make use of Lenovo's hidden system partition via Rescue & Recovery or One Key Recoveryapplications, depending on system model.ĬAUTION: Resetting your OS will wipe out all your data! Be sure to back up all application and user data before resetting the OS to factory. The procedures above does not reset the operating system back to factory settings. This does not roll back to previous version of BIOS, but does rewrite the feature settings.
Sometimes, reloading BIOS defaults can be useful after a BIOS version upgrade is performed, if there are abnormal symptoms noted. You can go back to BIOS and change settings that you previously customized, if needed. Select the option to reload BIOS defaults, then select the option to save and exit (ofter F9/F10)
If the system now starts up and produces the Lenovo or ThinkPad screen, press F1 or appropriate key to enter system BIOS.
Put in back the battery and reconnect AC.Press and hold power button several time for several seconds each time.Disconnect AC adapter (if it's connected).This will clear out stored values that may be corrupt, but will not affect data on the drive. The following procedure will remove the primary power sources of AC and main battery, and then drain residual capacitance by pressing the power switch several times. The cause may be some corruption of some bits of memory that affect how the power switch is read since the power switch on modern PCs doesn't actually switch power directly. Pressing the power button may result in no action, or sometimes the LEDs may just flash on momentarily and then back off without the system actually going through normal start up. Occasionally, some laptops may fail to properly power on or boot up correctly.