MSI B550-A PRO User Manual - Page 38

JCOM1: Serial Port Connector, JBAT1: Clear CMOS (Reset BIOS) Jumper, Resetting BIOS to default values

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JCOM1: Serial Port Connector This connector allows you to connect the optional serial port with bracket. 2 10 1 9 1 DCD 2 SIN 3 SOUT 4 DTR 5 Ground 6 DSR 7 RTS 8 CTS 9 RI 10 No Pin JBAT1: Clear CMOS (Reset BIOS) Jumper There is CMOS memory onboard that is external powered from a battery located on the motherboard to save system configuration data. If you want to clear the system configuration, set the jumpers to clear the CMOS memory. Keep Data (default) Clear CMOS/ Reset BIOS Resetting BIOS to default values 1. Power off the computer and unplug the power cord. 2. Use a jumper cap to short JBAT1 for about 5-10 seconds. 3. Remove the jumper cap from JBAT1. 4. Plug the power cord and Power on the computer. 38 Overview of Components

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38
Overview of Components
JBAT1: Clear CMOS (Reset BIOS) Jumper
There is CMOS memory onboard that is external powered from a battery located on
the motherboard to save system configuration data. If you want to clear the system
configuration, set the jumpers to clear the CMOS memory.
Keep Data
(default)
Clear CMOS/
Reset BIOS
Resetting BIOS to default values
1.
Power off the computer and unplug the power cord.
2.
Use a jumper cap to short
JBAT1
for about 5-10 seconds.
3.
Remove the jumper cap from
JBAT1
.
4.
Plug the power cord and Power on the computer.
1
2
10
9
1
DCD
2
SIN
3
SOUT
4
DTR
5
Ground
6
DSR
7
RTS
8
CTS
9
RI
10
No Pin
JCOM1: Serial Port Connector
This connector allows you to connect the optional serial port with bracket.