Robert Bosch GmbH 1 689 989 330 | 2016-11-30Troubleshooting | DCU 220 | 39 | enChapter 8TroubleshootingComputer problems can be caused by hardware, software, or both. When you encounterany problem, it might be a typical problem that can easily be solved.This chapter tells you what actions to take when solving common DCU 220 problems.Preliminary ChecklistHere are helpful hints to follow before you take further actions when you encounter anyproblem: Try to isolate which part of DCU 220 is causing the problem. Make sure that you turn on all peripheral devices before turning on DCU 220. If an external device has a problem, make sure that the cable connections are correctand secure. Make sure that the configuration information is properly set in the BIOS Setup program. Make sure that all the device drivers are correctly installed. Make notes of your observations. Are there any messages on the screen? Do anyindicators light? Do you hear any beeps? Detailed descriptions are useful to theservice personnel when you need to consult one for assistance.If any problem persists after you follow the instructions in this chapter, contact anauthorized dealer for help.