Summary

Chapter 3: Computer Assembly Step by Step 19Beep Code Meaning Cause9 beeps ROM checksum error Bad BIOS10 beeps CMOS checksum error Bad motherboard11 beeps Cache memory bad Bad CPU or motherboardDescribe the BIOS SetupThe BIOS contains a setup program used to configure settings for hardware devices. Theconfiguration data is saved to a special memory chip called a complementary metal-oxidesemiconductor (CMOS). CMOS is maintained by the battery in the computer. If this batterydies, all BIOS setup configuration data is lost. If this occurs, replace the battery and reconfigurethe BIOS settings.To enter the BIOS setup program, you must press the proper key or key sequence duringPOST. Most computers use the Delete key. Your computer may use another key or combinationof keys, as specified during the boot process.Figure 3-11 shows an example of a BIOS setup program.Figure 3-11BIOS Setup Screen ShotHere are some common BIOS setup menu options:■■■Main: System time, date, HDD type, and so onAdvanced: Infrared port settings, parallel port settings, and so onSecurity: Password settings for the setup utility