121If Something Goes WrongKeyboard problemsThe battery appears not to power the computer foras long as it usually does.If you frequently repeat shallow charge and discharge, thebattery meter may become inaccurate. Let the batterydischarge completely, then try charging it again.Check the power options via your Power Plans (see “PowerPlans” on page 81). Have you added a device that takes itspower from the battery? Is your software using the internalstorage drive more? Is the display power set to turn offautomatically? Was the battery fully charged to begin with?All these conditions affect how long the charge lasts.After a period of time, the battery will lose its ability toperform at maximum capacity and will need to be replaced.This is normal for all batteries.For more information on maintaining battery power, see“Changing the main battery” on page 83.Keyboard problemsYou have connected an external keyboard and theoperating system displays one or more keyboarderror messages.You may need to update your keyboard driver. Refer to thedocumentation that came with the keyboard or to thekeyboard manufacturer's Web site.The keyboard you connected may be defective orincompatible with the computer. Try using a different make ofkeyboard.Display problemsHere are some typical display problems and their solutions:The screen is blank.Display Auto Off may have gone into effect. Press any key toactivate the screen.If you are using the built-in screen, make sure the displaypriority is not set for an external monitor. To do this, press F4 .If this does not correct the problem, press F4 again to returnthe display priority to its previous setting.HINT: Pressing the F4 key several times will advance youthrough the display options.
