AMD Motherboards - B450 Pro4 Ethernet Port Issue

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B450 Pro4 Ethernet Port Issue

Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=14181
Printed Date: 09 Aug 2025 at 12:41am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: B450 Pro4 Ethernet Port Issue

Posted By: nrmason
Subject: B450 Pro4 Ethernet Port Issue
Date Posted: 23 Apr 2020 at 8:44pm

Just purchased this motherboard last week and the Ethernet port isn't working.

Ethernet is not registering with the motherboard:
- No Driver on device manager (besides WAN Miniport)
- Driver error when installing (The Realtek Network Controller was not found. If Deep Sleep Mode is enabled Please Plug the Cable.)
- No green or orange lighting on the back of the motherboard when Ethernet is plugged in (Router light is flashing orange).

What I tried:
Reinstalling driver
3 different Ethernet cords
Looking in bios for deep sleep or anything disabled and couldn't find anything

Any ideas?

Replies:

Posted By: ThreeDee
Date Posted: 23 Apr 2020 at 11:02pm

Reset BIOS to defaults and see if it "automagically" comes to life .. if not, I'd exchange the board for another one.

should be activity at least when you initially boot up

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