AMD Motherboards - X370 Killer Sli/ac Won't Post

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X370 Killer Sli/ac Won't Post

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=7596
Printed Date: 19 Jul 2025 at 12:40pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: X370 Killer Sli/ac Won't Post

Posted By: Coltsbro
Subject: X370 Killer Sli/ac Won't Post
Date Posted: 07 Feb 2018 at 10:43am

So I'm at a bit of a loss for what to do here. I had setup my computer last month and everything was working great, I was up and running with BIOS version 3.4. I heard that BIOS 4.5 had come out and tried to update to that. The update to the bridge BIOS went smoothly, everything ran perfect. I then updated to 4.5, and that's where the problems started. I got to the screen where it asked me to restart the computer after BIOS update, hit enter, and then my computer went into an endless power cycle loop without post. I thought that the update had somehow corrupted, so I RMA'd the board and just received the new one. After setting that all up, I get the same symptoms.

I have tried clearing CMOS, I tried removing the ram and booting, I tried removing the GPU and booting, and nothing works. The only thing I can arrive at now is I think somehow something happened to the CPU during the BIOS update, but I'm not sure how that would happen. Here are my specs:

Ryzen 5 1600x

X370 Killer SLI/ac

PNY Anarchy 16GB DDR4 2400

EVGA GTX 1080 FTW2

EVGA Supernova 650W G3

This all worked perfectly fine before that initial update to 4.5. I'm honestly at a loss, and before I start a CPU RMA I would like to see what everyone else thinks.

Replies:

Posted By: kerberos_20
Date Posted: 07 Feb 2018 at 1:19pm

" rel="nofollow - first boot take some time (several reboots)
in some cases it can take few minutes
maybe record on video what dr debug shows? that could help

Posted By: Coltsbro
Date Posted: 08 Feb 2018 at 7:31am

Wasn't a first boot issue. It won't even POST, just 10 second power loops (have let it go for 6-7 times before, no POST). This all worked fine on BIOS version 3.4 and issues started after updating to 4.5 (after update to bridge BIOS 3.5 worked fine).

I tried hooking in a motherboard speaker to it and had no beeps. I am having a friend test it in his rig to see if it beeps. If it does, I read that the issue is my CPU (this Mobo is a RMA from Asrock that was tested to work).

Posted By: deskok
Date Posted: 28 Feb 2018 at 5:56pm

" rel="nofollow - I have the same issue, it keep rebooting by itself and flashing of RED LED light after bios upgrade. I don't know what to do now?

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