40EnglishTroubleshootingThis chapter shows you how to deal with common system problems. Read it beforecalling a technician if a problem occurs. Solutions to more serious problems requireopening up the computer. Do not attempt to open the computer yourself; contactyour dealer or authorized service center for assistance.Troubleshooting tipsThis notebook PC incorporates an advanced design that delivers onscreen errormessage reports to help you solve problems.If the system reports an error message or an error symptom occurs, see "Errormessages" below. If the problem cannot be resolved, contact your dealer. See"IRequesting service" on page 42.Error messagesIf you receive an error message, note the message and take the corrective action.The following table lists the error messages in alphabetical order together with therecommended course of action.If you still encounter problems after going through the corrective measures, pleasecontact your dealer or an authorized service center for assistance.Error messages Corrective actionCMOS battery bad Contact your dealer or an authorized service center.CMOS checksum error Contact your dealer or an authorized service center.Disk boot failure Insert a system (bootable) disk, then press <Enter> toreboot.Equipment configurationerrorPress (during POST) to enter the BIOS utility, thenpress Exit in the BIOS utility to reboot.Hard disk 0 error Contact your dealer or an authorized service center.Hard disk 0 extendedtype errorContact your dealer or an authorized service center.I/O parity error Contact your dealer or an authorized service center.Keyboard error or nokeyboard connectedContact your dealer or an authorized service center.Keyboard interface error Contact your dealer or an authorized service center.Memory size mismatch Press (during POST) to enter the BIOS utility, thenpress Exit in the BIOS utility to reboot.
