ASRock Forums : ASRock Z87 EXTREME4 won't restart - debug code 4F https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Wed, 03 Jun 2026 22:50:35 +0000 Mon, 07 Jun 2021 16:43:38 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=3515 <![CDATA[ASRock Forums]]> https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ <![CDATA[ASRock Z87 EXTREME4 won't restart - debug code 4F : Hi, i am leaving this here if...]]> https://forum.asrock.com/forum_posts.asp?TID=3515&PID=87568&title=asrock-z87-extreme4-wont-restart-debug-code-4f#87568 Author: tamas3232
Subject: 3515
Posted: 07 Jun 2021 at 4:43pm

Hi, i am leaving this here if anyone else now or in the future has the same problem.

I had the exact same issue with my PC what was mentioned, Error Code 15,40,4F. I had a lot of issues with electricity, daily 5-10 power-outfall. I also connected my PC to an Back UPS (APC brand) but i guess it was too late and this sudden powerloss corrupted the BIOS Chip.
I resetted every memory stick, my GPU, only had just the drive connected which has the OS. In my case i has an PCI-E to M.2 SSD adapter(Axagon), with the M.2 NVMe Samsung EVO 1TB SSD.

So, i tried out everything like above mentioned, resetted the CMOS memory, changed the battery too, but it did not solved in my case.

The solution was actually really easy at the end. I placed the BIOS jumper from A to B. After that my PC could boot normally. In the Boot Menu under Tool there is that line "Secure Backup UEFI (B->A)". I clicked on it and wrote that after a restart (which occurs automatically) will start the copying process. After the buckup, I resetted the BIOS jumper from B back to A and it started normally as it should. I also made a BIOS Update because of teh mentioned OS drive is an NVMe drive, just the newer 3.40 version has NVMe support, so after I updated that too, everything is fine. I ordered a new BIOS Chip just in case but eventually it turned out that my BIOS Chip did not die.

Have a nice day guys.

Tamas


1. Boot Menu --> Tool


2. Backup Process
]]> Mon, 07 Jun 2021 16:43:38 +0000 https://forum.asrock.com/forum_posts.asp?TID=3515&PID=87568&title=asrock-z87-extreme4-wont-restart-debug-code-4f#87568 <![CDATA[ASRock Z87 EXTREME4 won't restart - debug code 4F : Thank you for your reply and useful...]]> https://forum.asrock.com/forum_posts.asp?TID=3515&PID=64816&title=asrock-z87-extreme4-wont-restart-debug-code-4f#64816 Author: enorbet2
Subject: 3515
Posted: 16 Jul 2019 at 2:16am

Thank you for your reply and useful link, badbri. FWIW I'd be more disappointed than I already am if anything else is bad, considering how I build my systems with superb cooling and the best PSUs protected by 900 watt UPS. Monitoring voltages and temps seems essential to me and my Asrock rarely exceeds 47C though the GPU will hit 56C during heavy loads.

I have many PCs more than twice as old that still run just fine, including a few Socket 7s and even an Asus Slot 1. I'm typing this from the Asrock Z77 right now. It runs just fine. It's just that if it shuts down it can take upwards of an hour to get past the 4F cycling and it isn't the code that is corrupted since it successfully flashed but to no avail. Something must've physically failed in the chip.

Anyway thank you since I'll likely try replacing that chip. ]]> Tue, 16 Jul 2019 02:16:28 +0000 https://forum.asrock.com/forum_posts.asp?TID=3515&PID=64816&title=asrock-z87-extreme4-wont-restart-debug-code-4f#64816 <![CDATA[ASRock Z87 EXTREME4 won't restart - debug code 4F : Your BIOS is socketed not soldered...]]> https://forum.asrock.com/forum_posts.asp?TID=3515&PID=64795&title=asrock-z87-extreme4-wont-restart-debug-code-4f#64795 Author: badbri
Subject: 3515
Posted: 15 Jul 2019 at 8:52am

Your BIOS is socketed not soldered so you may be able to get a new BIOS chip from Asrock support. Go here: http://forum.asrock.com/forum_posts.asp?TID=5265&title=howto-contact-tech-support
However being near 7 years old it may be more than the BIOS that has gone bad.]]> Mon, 15 Jul 2019 08:52:11 +0000 https://forum.asrock.com/forum_posts.asp?TID=3515&PID=64795&title=asrock-z87-extreme4-wont-restart-debug-code-4f#64795 <![CDATA[ASRock Z87 EXTREME4 won't restart - debug code 4F : Nevermind... I guess this just...]]> https://forum.asrock.com/forum_posts.asp?TID=3515&PID=64617&title=asrock-z87-extreme4-wont-restart-debug-code-4f#64617 Author: enorbet2
Subject: 3515
Posted: 12 Jul 2019 at 11:28pm

Nevermind... I guess this just shows how rattled and pissed off I am. I totally missed this thread is specific to Z87 not Z77... guess Asrock wised up after Z77...kinda. No backup chip for me :(]]> Fri, 12 Jul 2019 23:28:15 +0000 https://forum.asrock.com/forum_posts.asp?TID=3515&PID=64617&title=asrock-z87-extreme4-wont-restart-debug-code-4f#64617 <![CDATA[ASRock Z87 EXTREME4 won't restart - debug code 4F : GreetzI know this is nearly necro...]]> https://forum.asrock.com/forum_posts.asp?TID=3515&PID=64552&title=asrock-z87-extreme4-wont-restart-debug-code-4f#64552 Author: enorbet2
Subject: 3515
Posted: 11 Jul 2019 at 9:18pm

Greetz
I know this is nearly necro but I'm still using my Asrock Z77 Extreme 4 for my Main and it has served me quite well for years but I have much older PCs that work just fine. I'm a bit peeved at this issue for such a ridiculously small thing to make my whole system unreliable. Here's my exact deal.

It began slowly and escalated. First 3 quick beeps followed by a pause and another set of 3. Since that is supposed to be memory issue and I spent a lot extra for Corsair Vengeance hi performance ram, naturally I ran Memtest+ for many hours - No errors. It was common that after a Reset pulse or 3 it would boot and run for months (up 25/7) just fine. Since I have a 1KW UPS it has never suffered spikes or a bad shutdown.. but it kept getting longer (more cvcling, more beeps) any time I did have to reboot. It would, like everyon's here, pause at 4F and recycle... for very long times.

Finally one day the Reset button stopped working altogether! so I cleared CMOS (removed battery too) and then just let it run for around an hour till it finally came up and I successfully Instant Flashed a newer BIOS version. RESET is fixed but that is ALL!

I don't see anything in my Manual about Backup BIOS nor any chips marked so on the board. I don't know how to swap for Backup despite having experience at Hot Swapping BIOS chips back in the day.

TLDR - Where do I find and/or how do I swap for Backup BIOS?

Is it necessary to buy a new CMOS chip?

Any help greatly appreciated. Thanks.]]> Thu, 11 Jul 2019 21:18:44 +0000 https://forum.asrock.com/forum_posts.asp?TID=3515&PID=64552&title=asrock-z87-extreme4-wont-restart-debug-code-4f#64552 <![CDATA[ASRock Z87 EXTREME4 won't restart - debug code 4F : According to the Asrock support,...]]> https://forum.asrock.com/forum_posts.asp?TID=3515&PID=46806&title=asrock-z87-extreme4-wont-restart-debug-code-4f#46806 Author: rafadr
Subject: 3515
Posted: 06 Mar 2018 at 6:53pm

According to the Asrock support, we can switch BIOS A to BIOS B by changing the BIOS jumper.



After changing, you can enter in BIOS setup and backup the working BIOS to the corrupted one.

No need to buy a new chip.

Cheers!


Edited by rafadr - 06 Mar 2018 at 6:55pm]]> Tue, 06 Mar 2018 18:53:55 +0000 https://forum.asrock.com/forum_posts.asp?TID=3515&PID=46806&title=asrock-z87-extreme4-wont-restart-debug-code-4f#46806 <![CDATA[ASRock Z87 EXTREME4 won't restart - debug code 4F : tempy wrote:According to this...]]> https://forum.asrock.com/forum_posts.asp?TID=3515&PID=45759&title=asrock-z87-extreme4-wont-restart-debug-code-4f#45759 Author: rafadr
Subject: 3515
Posted: 23 Feb 2018 at 9:25pm

Originally posted by tempy tempy wrote:

According to this forum post, 4F is a faulty BIOS Chip. Temporary solution would be to switch BIOS A with BIOS B, and acquire a new one online to replace BIOS B. Tried it on mine and it worked, and it happened right when I attempted System Restore on Windows 7, thought I corrupted the OS on my SSD but no, I figured a mobo code has nothing to do with SSD filed being corrupted.

https://forums.tweaktown.com/asrock/62764-asrock-error-code-4f.html

Replacing BIOS A chip with BIOS B chip solved my issue too. Thanks, I had this problem for a while.

I'll buy a new BIOS chip to replace the problematic one.

Here is an image with the location of BIOS chips:




]]> Fri, 23 Feb 2018 21:25:26 +0000 https://forum.asrock.com/forum_posts.asp?TID=3515&PID=45759&title=asrock-z87-extreme4-wont-restart-debug-code-4f#45759 <![CDATA[ASRock Z87 EXTREME4 won't restart - debug code 4F : I had 4F error when waking up...]]> https://forum.asrock.com/forum_posts.asp?TID=3515&PID=43039&title=asrock-z87-extreme4-wont-restart-debug-code-4f#43039 Author: HaveNoName
Subject: 3515
Posted: 14 Jan 2018 at 5:16pm

I had 4F error when waking up from sleep cause i had disabled gear down mode. ]]> Sun, 14 Jan 2018 17:16:23 +0000 https://forum.asrock.com/forum_posts.asp?TID=3515&PID=43039&title=asrock-z87-extreme4-wont-restart-debug-code-4f#43039 <![CDATA[ASRock Z87 EXTREME4 won't restart - debug code 4F : The Dr Debug display shows various...]]> https://forum.asrock.com/forum_posts.asp?TID=3515&PID=39484&title=asrock-z87-extreme4-wont-restart-debug-code-4f#39484 Author: parsec
Subject: 3515
Posted: 19 Nov 2017 at 9:43am

The Dr Debug display shows various POST codes as the POST process runs when the PC starts. That does NOT mean each code you see is flagging an error.

The only code shown that has any significance is the last POST code shown, and then ONLY if the PC does not allow you to enter the UEFI/BIOS, or does not boot your OS. If you can get into the UEFI UI or boot the OS, POST completed fine, and any code shown is just leftover, the code of the last POST process that ran.

While an electrical problem could have caused a damaged UEFI chip, just the UEFI code may have been corrupted. I would first try to install whatever UEFI version you are currently using again, and see if that solves the problem. Please use the Instant Flash method to flash to the same or newer version, it is the most reliable.

If that does not work, as suggested above, switch to the backup UEFI chip, and see if the board still behaves as it has been with your issue. If that seems to fix the problem, you can get a new UEFI chip from ASRock and insert it yourself, no soldering necessary.


]]> Sun, 19 Nov 2017 09:43:24 +0000 https://forum.asrock.com/forum_posts.asp?TID=3515&PID=39484&title=asrock-z87-extreme4-wont-restart-debug-code-4f#39484 <![CDATA[ASRock Z87 EXTREME4 won't restart - debug code 4F : According to this forum post,...]]> https://forum.asrock.com/forum_posts.asp?TID=3515&PID=39482&title=asrock-z87-extreme4-wont-restart-debug-code-4f#39482 Author: tempy
Subject: 3515
Posted: 19 Nov 2017 at 8:48am

According to this forum post, 4F is a faulty BIOS Chip. Temporary solution would be to switch BIOS A with BIOS B, and acquire a new one online to replace BIOS B. Tried it on mine and it worked, and it happened right when I attempted System Restore on Windows 7, thought I corrupted the OS on my SSD but no, I figured a mobo code has nothing to do with SSD filed being corrupted.

https://forums.tweaktown.com/asrock/62764-asrock-error-code-4f.html
]]> Sun, 19 Nov 2017 08:48:16 +0000 https://forum.asrock.com/forum_posts.asp?TID=3515&PID=39482&title=asrock-z87-extreme4-wont-restart-debug-code-4f#39482