Biostar 865G MICRO 775 Spécifications télécharger pdf (Page 41)

139

Maintaining, Installing, and Conﬁguring a Motherboard

REPLACE THE CMOS BATTERY

The CMOS battery on the motherboard is considered a ﬁeld replaceable unit. The battery is

designed to last for years and recharges when the motherboard has power. However, on rare

occasions you might need to replace one if the system loses BIOS settings when it is

unplugged. Make sure the replacement battery is an exact match to the original or is one the

motherboard manufacturer recommends for the board. Power down the system, unplug it,

press the power button to drain the power, and remove the case cover. Use your ground

bracelet to protect the system against ESD. The old battery can be removed with a little

prying using a ﬂathead screwdriver. The new battery pops into place. For more speciﬁc

direction, see the motherboard documentation.

Now let’s turn our attention to installing or replacing a motherboard.

INSTALLING OR REPLACING A MOTHERBOARD

When you purchase a motherboard, the package comes with the board, I/O shield, documenta-

tion, drivers, and various screws, cables, and connectors (see Figure 3-42). When you replace a

motherboard, you pretty much have to disassemble an entire computer, install the new mother-

board, and reassemble the system, which you learned to do in Chapter 2. The following list is

meant to be a general overview of the process and is not meant to include the details of all pos-

sible installation scenarios, which can vary according to the components and OS you are using.

BIOS

jumper

group

Jumper

Position

Mode Description

Normal

(default)

The current BIOS configuration is used for booting.

Configure After POST, the BIOS displays a menu in CMOS setup

that can be used to clear the user and supervisor

power-on passwords.

Recovery is used to recover from a failed BIOS update.

Details can be found on the motherboard CD.

Recovery

Figure 3-41 BIOS conﬁguration jumper settings

Courtesy: Course Technology/Cengage Learning

A+ 220-702

A+

220-702

1.1

4.2

A+

220-702

1.1

Figure 3-40 This group of three jumpers controls the BIOS conﬁguration

Courtesy: Course Technology/Cengage Learning

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