https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Mon, 20 Apr 2026 05:05:38 +0000 Wed, 20 Jan 2021 00:19:23 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=17737 https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ https://forum.asrock.com/forum_posts.asp?TID=17737&PID=83244&title=error-code-a2-cannot-reset-bios#83244 Author: dani958
Subject: 17737
Posted: 20 Jan 2021 at 12:19am

Thanks Xaltar
I already did clear CMOS many times and the RAM sticks are in the right position

Module 0: A1
Empty
Module 1: A2
DDR4, 8192 MB, 64-bit, 2133 MHz
ChannelA-DIMM1 BANK 1 Kingston KHX2133C14D4/8G
Module 2: B1
Empty
Module 3: B2
DDR4, 8192 MB, 64-bit, 2133 MHz
ChannelB-DIMM1 BANK 3 Kingston KHX2133C14D4/8G


In the last few days I have tried to turn the PC on, but it's stuck at bios page with A2 code.
]]> Wed, 20 Jan 2021 00:19:23 +0000 https://forum.asrock.com/forum_posts.asp?TID=17737&PID=83244&title=error-code-a2-cannot-reset-bios#83244 https://forum.asrock.com/forum_posts.asp?TID=17737&PID=83099&title=error-code-a2-cannot-reset-bios#83099 Author: Xaltar
Subject: 17737
Posted: 14 Jan 2021 at 10:29pm

RAM should be installed in slots A2 and B2 for optimum performance with 2 modules.

Try this for clearing CMOS:
http://forum.asrock.com/forum_posts.asp?TID=630&title=how-to-clear-cmos-via-battery-removal]]> Thu, 14 Jan 2021 22:29:45 +0000 https://forum.asrock.com/forum_posts.asp?TID=17737&PID=83099&title=error-code-a2-cannot-reset-bios#83099 https://forum.asrock.com/forum_posts.asp?TID=17737&PID=83094&title=error-code-a2-cannot-reset-bios#83094 Author: dani958
Subject: 17737
Posted: 14 Jan 2021 at 6:56pm

I did run memtest64 and no error found.

Here the log:

Module 0:
Empty
Module 1:
DDR4, 8192 MB, 64-bit, 2133 MHz
ChannelA-DIMM1 BANK 1 Kingston KHX2133C14D4/8G
Module 2:
Empty
Module 3:
DDR4, 8192 MB, 64-bit, 2133 MHz
ChannelB-DIMM1 BANK 3 Kingston KHX2133C14D4/8G

0.000: Detecting usable memory (16332 MB theoretical max)...
16.047: 14144 MB Test starting on 4 CPUs...
16.093: Allocating memory...
24.812: Starting loop 1
24.828: Stuck Address Test...
29.156: Random Data Test...
34.453: Move Data Test...
36.593: Bitpattern Test...
144.593: Starting loop 2
144.609: Stuck Address Test...
148.640: Random Data Test...
153.797: Move Data Test...
155.953: Bitpattern Test...
263.843: Starting loop 3
263.859: Stuck Address Test...
268.000: Random Data Test...
279.093: Move Data Test...
281.234: Bitpattern Test...
388.359: Starting loop 4
388.359: Stuck Address Test...
392.390: Random Data Test...
397.531: Move Data Test...
399.672: Bitpattern Test...
506.187: Starting loop 5
506.187: Stuck Address Test...
510.203: Random Data Test...
515.328: Move Data Test...
517.484: Bitpattern Test...
625.125: Starting loop 6
625.140: Stuck Address Test...
629.140: Random Data Test...
634.281: Move Data Test...
636.422: Bitpattern Test...
743.078: Starting loop 7
743.078: Stuck Address Test...
747.093: Random Data Test...
752.265: Move Data Test...
754.406: Bitpattern Test...
862.578: Starting loop 8
862.578: Stuck Address Test...
866.593: Random Data Test...
871.797: Move Data Test...
874.015: Bitpattern Test...

... it looped for another 76 times ...

10005.140: Test finished with no errors detected]]> Thu, 14 Jan 2021 18:56:55 +0000 https://forum.asrock.com/forum_posts.asp?TID=17737&PID=83094&title=error-code-a2-cannot-reset-bios#83094 https://forum.asrock.com/forum_posts.asp?TID=17737&PID=83049&title=error-code-a2-cannot-reset-bios#83049 Author: dani958
Subject: 17737
Posted: 12 Jan 2021 at 7:38pm

Thanks RLGB, I will try to run Memtest when the pc will boot again, but it won't start now. ]]> Tue, 12 Jan 2021 19:38:16 +0000 https://forum.asrock.com/forum_posts.asp?TID=17737&PID=83049&title=error-code-a2-cannot-reset-bios#83049 https://forum.asrock.com/forum_posts.asp?TID=17737&PID=82978&title=error-code-a2-cannot-reset-bios#82978 Author: RLGL
Subject: 17737
Posted: 10 Jan 2021 at 10:01pm

When it does boot run Memtest. If the ram is good then I would try a different power supply. ]]> Sun, 10 Jan 2021 22:01:53 +0000 https://forum.asrock.com/forum_posts.asp?TID=17737&PID=82978&title=error-code-a2-cannot-reset-bios#82978 https://forum.asrock.com/forum_posts.asp?TID=17737&PID=82959&title=error-code-a2-cannot-reset-bios#82959 Author: dani958
Subject: 17737
Posted: 09 Jan 2021 at 9:49pm

OGM!
I turn the pc on, it is stuck at bios (A2 code), after about 1h it magically booted into Windows 10.

What can the problem be?]]> Sat, 09 Jan 2021 21:49:13 +0000 https://forum.asrock.com/forum_posts.asp?TID=17737&PID=82959&title=error-code-a2-cannot-reset-bios#82959 https://forum.asrock.com/forum_posts.asp?TID=17737&PID=82955&title=error-code-a2-cannot-reset-bios#82955 Author: dani958
Subject: 17737
Posted: 09 Jan 2021 at 7:16pm

Today it's same story.
I turn the pc on and stuck at A2 code.

CPU is ok.
GPU is ok.
PSU and RAM are ok otherwise it wouldn't start yesterday, am I right?

Maybe the problem is the mobo (ASRock Z170 Pro4)...
]]> Sat, 09 Jan 2021 19:16:29 +0000 https://forum.asrock.com/forum_posts.asp?TID=17737&PID=82955&title=error-code-a2-cannot-reset-bios#82955 https://forum.asrock.com/forum_posts.asp?TID=17737&PID=82924&title=error-code-a2-cannot-reset-bios#82924 Author: dani958
Subject: 17737
Posted: 08 Jan 2021 at 11:23pm

I ran Intel processor Diagnostic Toll and my cpu is ok.

Humidity on the mobo?

My GPU has a little damp spot on the top.]]> Fri, 08 Jan 2021 23:23:37 +0000 https://forum.asrock.com/forum_posts.asp?TID=17737&PID=82924&title=error-code-a2-cannot-reset-bios#82924 https://forum.asrock.com/forum_posts.asp?TID=17737&PID=82922&title=error-code-a2-cannot-reset-bios#82922 Author: dani958
Subject: 17737
Posted: 08 Jan 2021 at 9:59pm

I tried to reinstall CPU & PSU. Stuck at A2.
Then I place all the components and used the hairdryer and now it magically works again.

What can the problem be? ]]> Fri, 08 Jan 2021 21:59:58 +0000 https://forum.asrock.com/forum_posts.asp?TID=17737&PID=82922&title=error-code-a2-cannot-reset-bios#82922 https://forum.asrock.com/forum_posts.asp?TID=17737&PID=82910&title=error-code-a2-cannot-reset-bios#82910 Author: ASRock_TSD
Subject: 17737
Posted: 08 Jan 2021 at 3:23pm

Dear Dani958,

Thanks for the reply.

There is often a situation where the system starts but does not have the signals of the monitor.

One of the causes of this problem is that the system cannot get the RAM to work.

If reinstall the PSU and CPU result in the same behavior, we will recommend contacting the store directly to check all of the parts.

With thanks,
ASRock TSD]]> Fri, 08 Jan 2021 15:23:13 +0000 https://forum.asrock.com/forum_posts.asp?TID=17737&PID=82910&title=error-code-a2-cannot-reset-bios#82910