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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
20 IT Essentials: PC Hardware and Software Companion Guide■■■Others: Low-battery alarm, system beep, and so onBoot: The computer’s boot orderExit: Exits the setup utilityLab 3.9.2: Boot the ComputerIn this lab you boot the computer and verify BIOS settings. Refer to the lab in ITEssentials: PC Hardware and Software Labs and Study Guide, Third Edition. You may performthis lab now or wait until the end of the chapter.
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iiiTrademark AcknowledgmentsAll ter
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vAbout the Technical ReviewersDavid
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ixIdentify the Names, Purposes, and
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CHAPTER 1Introduction to the Person
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CHAPTER 7Fundamental Printers and S
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CHAPTER 13Advanced Laptops and Port
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CHAPTER 15Advanced NetworksObjectiv
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GlossaryThis glossary defines many
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ase station 3AppleTalk A protocol s
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CMOS battery 5bus topology A networ
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desktop computer 7crosstalk Interfe
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dynamic routing 9Domain Name System
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floppy data cable 11FFast Ethernet
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IEEE 802.11 13Hardware Compatibilit
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media-handling options 17line of si
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network operating system 19multithr
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Regedit 23Printer Control Language
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three-claw part retriever 27surge s
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virtual memory 29Uninterruptible Po
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zero insertion force (ZIF) socket 3
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