X870E Taichi Lite Ethernet Issue

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   That is great to hear. As for it being a sign of anything, I doubt it or the person
who shared the fix would likely have posted back here. It's more likely that 
something in the LAN's firmware got corrupted, a power cycle (full disconnect from
mains and power switch pressed and held for a few seconds) would be the only way
to clear corrupted values in the LAN's ROM. It could be caused by something as simple
as a marginal/faulty cable sending bogus data or even a bit of debris/corrosion
on one of the connector's pins. 

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Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 38978	Post Options Post Reply Quote Xaltar Report Post Thanks(0) Quote Reply Topic: X870E Taichi Lite Ethernet Issue Posted: 01 Jun 2026 at 4:32am
	That is great to hear. As for it being a sign of anything, I doubt it or the person who shared the fix would likely have posted back here. It's more likely that something in the LAN's firmware got corrupted, a power cycle (full disconnect from mains and power switch pressed and held for a few seconds) would be the only way to clear corrupted values in the LAN's ROM. It could be caused by something as simple as a marginal/faulty cable sending bogus data or even a bit of debris/corrosion on one of the connector's pins.


Basemath Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 31 May 2026 Location: KSA Status: Offline Points: 45	Post Options Post Reply Quote Basemath Report Post Thanks(0) Quote Reply Posted: 01 Jun 2026 at 2:48am
	Thanks Xaltar. This repository directly saved me money I needed. I'll give more context in case others go through similar sympotoms. Problem started with Ethernet rapidly disconnecting then connecting for like a minute straight, then it's ok for the rest of the day. This happened daily for a couple of weeks until it suddenly decided to just remain disconnected with a "network cable unplugged" status like OP. No amount of troubleshooting worked. New cable didn't work. Was about to buy a USB Ethernet dongle but a last Googling lead me to this thread. Full power disconnect restored functionality on first try. Hopefully this isn't a sign for a dying network adapter.

Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 38978	Post Options Post Reply Quote Xaltar Report Post Thanks(1) Quote Reply Posted: 31 May 2026 at 1:16am
	Awesome, that is exactly what these forums are here for. Not only to ask for help but also as a repository of advice and tips to be used. I have made the thread a sticky post so it is easier for others to find.


Basemath Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 31 May 2026 Location: KSA Status: Offline Points: 45	Post Options Post Reply Quote Basemath Report Post Thanks(1) Quote Reply Posted: 31 May 2026 at 12:09am
	@michalsti Brooo i'm just a guy who created an account to tell another guy I LOVE YOU. Thanks I wish you all the best!

Prognoz Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 16 Nov 2025 Status: Offline Points: 15	Post Options Post Reply Quote Prognoz Report Post Thanks(0) Quote Reply Posted: 16 Nov 2025 at 12:35am
	@michalsti solution works, thank you so much for providing the solution!

michalsti Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 12 Jul 2025 Status: Offline Points: 75	Post Options Post Reply Quote michalsti Report Post Thanks(3) Quote Reply Posted: 12 Jul 2025 at 5:15pm
	Guys I had same problem with my X870 Taichi. One day suddenly my LAN stopped working. No solution would work, I ended up buying USB->Ethernet dongle. Some time later my Bluetooth stopped working, just gone from system. Tried all, reinstalling, BIOS etc. All seemed fine but it just wasn't there. AND! I found a solution in a different topic on this board by someone using older board years ago. THE SOLUTION IS: Unplug the power cable completely, leave the PC for a couple minutes like that, discharge all that might be left. Then reconnect the power cable to PSU and both LAN and BT are back!

tomcattweak Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 10 Dec 2024 Status: Offline Points: 15	Post Options Post Reply Quote tomcattweak Report Post Thanks(0) Quote Reply Posted: 11 Dec 2024 at 12:17am
	According to the Realtek - Ethernet Diagnostic Utility under Cable I have varying wire pairs that are shorted, open or normal when (good)cable is connected and pairs 1-2, 3-6 short and pairs 4-5 & 7-8 open when no cable connected. Had it automagically fix itself for a few hours then back to not working. It connected at 100 and had only one pair shorted then all went normal and was @ 1000. I'm running 1126.21.903.2024 from Realtec website for the RTL8126.

dudley1881 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 09 Dec 2024 Status: Offline Points: 15	Post Options Post Reply Quote dudley1881 Report Post Thanks(0) Quote Reply Posted: 09 Dec 2024 at 4:32am
	Same issue, motherboard installed on Nov 25, 2024 , ethernet port working no problem by Dec 5th, 2024 the ethernet port does not connect. Checked the network cabling with other devices all work but no activity lights when plugged into the X870E ethernet port 5G. Using WiFi until I find a solution, must have been a patch or update, as it was working.

litiantian Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 28 Nov 2024 Status: Offline Points: 30	Post Options Post Reply Quote litiantian Report Post Thanks(0) Quote Reply Posted: 29 Nov 2024 at 8:20am
	I bought an Ethernet Switch, and the problem is solved... ASRock owes me a gift card. https://www.amazon.ca/gp/product/B0C64N2QN7?ref=ppx_pt2_dt_b_prod_image

litiantian Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 28 Nov 2024 Status: Offline Points: 30	Post Options Post Reply Quote litiantian Report Post Thanks(0) Quote Reply Posted: 28 Nov 2024 at 6:34am
	not working...