8-2 TroubleshootingPreliminary ChecklistHere are helpful hints to follow before you take further actions when youencounter any problem: Try to isolate which part of the computer is causing the problem. Make sure that you turn on all peripheral devices before turning on thecomputer. If an external device has a problem, make sure that the cableconnections are correct and secure. Make sure that the configuration information is properly set in the BIOSSetup program. Make sure that all the device drivers are correctly installed. Make notes of your observations. Are there any messages on the screen?Do any indicators light? Do you hear any beeps? Detailed descriptionsare useful to the service personnel when you need to consult one forassistance.If any problem persists after you follow the instructions in this chapter,contact an authorized dealer for help.