Jcom1: Serial Port Connector; Jbat1: Clear Cmos (Reset Bios) Jumper; Ez Debug Led - MSI A520M PRO-C DASH User Manual

JCOM1: Serial Port Connector

This connector allows you to connect the optional serial port with bracket.
2 10
1
9

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.
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.

EZ Debug LED

These LEDs indicate the status of the motherboard.
CPU - indicates CPU is not detected or fail.
DRAM - indicates DRAM is not detected or fail.
VGA - indicates GPU is not detected or fail.
BOOT - indicates booting device is not detected or fail.
1 DCD
3 SOUT
5 Ground
7 RTS
9 RI
Keep Data
(default)
2
4
6
8
10
Clear CMOS/ Reset
BIOS
Overview of Components
SIN
DTR
DSR
CTS
No Pin
17