Manual for B550-A PRO - Troubleshooting and error codes + PDF Download

Manual for B550-A PRO - Troubleshooting and error codes + PDF Download

Brand: MSI

Category: Motherboard

Document Type:

Language: EN

Uploaded: April 8, 2025, 1:56 p.m.

Manual Publish Date: 2021-07

Warranty Summary

No warranty summary found in the manual.

This manual provides quick start instructions for installing the MSI B550-A PRO motherboard. Key steps include:

  • Preparing tools and components.
  • Safety information to prevent ESD damage.
  • Installing the CPU, DDR4 memory, and CPU cooler.
  • Connecting the front panel header and power connectors.
  • Installing the motherboard into the chassis.
  • Installing SATA drives and a graphics card.
  • Connecting peripheral devices.
  • Powering on the system.

For detailed instructions and video demonstrations, refer to the provided QR codes and URLs within the manual.

Troubleshooting and error codes

Problem Possible Solution
The power is not on.
  • Connect AC power cord securely.
  • Check ATX power connectors (ATX_PWR1, CPU_PWR1).
  • Ensure power supply switch is ON.
  • Verify power switch cable connection to JFP1 header.
  • Check JBAT1 jumper is set to Keep DATA.
  • Test with a different power supply.
The power is on, but no signal to monitor
  • Connect monitor power cord securely.
  • Ensure monitor is turned on.
  • Select correct monitor input.
  • For 3 long beeps: Reinstall memory module in DIMMA2 slot.
  • For 1 long 2 short beeps: Reinstall graphics card.
  • Test with another graphics card.
Computer does not boot after updating BIOS
  • Clear CMOS.
  • Use secondary BIOS (if available).
Lost BIOS password
  • Clear CMOS (settings will be lost).
There is no audio
  • Adjust volume.
  • Connect speakers/headphones to rear I/O panel audio ports.
  • Remove secondary audio devices.
  • Test with another speaker/headphone.
There is no network
  • Install network chipset driver.
  • Check network cable and LAN port LEDs.
  • Verify TCP/IP settings.
  • Restart/reset router.
  • Test with another LAN cable.
USB device is not working
  • Install USB drive driver.
  • Check USB device in Device Manager.
  • Connect to rear I/O panel USB port.
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