Frequently asked questions56English TroubleshootingThis chapter shows you how to deal with common system problems.Read it before calling a technician if a problem occurs. Solutions to moreserious problems require opening up the computer. Do not attempt toopen the computer yourself; contact your dealer or authorized servicecenter for assistance.Troubleshooting tipsThis computer incorporates an advanced design that delivers onscreenerror message reports to help you solve problems.If the system reports an error message or an error symptom occurs, see"Error messages" below. If the problem cannot be resolved, contact yourdealer. See "Requesting service" on page 54.Error messagesIf you receive an error message, note the message and take the correctiveaction. The following table lists the error messages in alphabetical ordertogether with the recommended course of action.Error messages Corrective actionCMOS battery bad Contact your dealer or an authorized servicecenter.CMOS checksumerrorContact your dealer or an authorized servicecenter.Disk boot failure Insert a system (bootable) disk, then press<Enter> to reboot.Equipmentconfiguration errorPress <F2> (during POST) to enter the BIOSutility, then press Exit in the BIOS utility toreboot.Hard disk 0 error Contact your dealer or an authorized servicecenter.Hard disk 0 extendedtype errorContact your dealer or an authorized servicecenter.I/O parity error Contact your dealer or an authorized servicecenter.Keyboard error or nokeyboard connectedContact your dealer or an authorized servicecenter.Keyboard interfaceerrorContact your dealer or an authorized servicecenter.Frequently asked questions