Z790 Taichi Lite POST Problem
Printed From: ASRock.com
Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=95699
Printed Date: 06 Feb 2025 at 5:53am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: Z790 Taichi Lite POST Problem
Posted By: Ash
Subject: Z790 Taichi Lite POST Problem
Date Posted: 06 Feb 2025 at 12:15am
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Hi I recently ran into the problem with Z790 Taichi Lite motherboard - it doesn't pass power on self test. LED display on motherboard flashes through the sequence of codes in the loop. Codes appeared on the motherboard LEDs are 00 C0 12 28 7F 19. PC the motherboard is used in wasn't run a couple of months. Intel gen 13700K was there and few months ago i applied August BIOS update to solve the problem with Intel processors of gen 13 and 14. No exposure to high temperature or excessive humidity whatsoever. No overclocking, no gaming. It wasn't in use more than 48 hours totally. Most of the LED codes shown above are not described in the Taichi Lite Z790 user manual. Appreciate for any ideas that could help to resolve the issue. |
Replies:
Posted By: Ash
Date Posted: 06 Feb 2025 at 12:21am
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Exact correct repeating sequence of codes are shown below: 7F 19 00 C0 15 00 12 28 00 |
Posted By: Xaltar
Date Posted: 06 Feb 2025 at 12:54am
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The codes are supposed to cycle, each code represents a step in the POST process. The only code that matters is the final code before the loop repeats or the code that gets stuck on the display (depending on the situation). This last code tells you what part of the POST process failed. Looking up that code should help identify and resolve your problem. All the codes should be listed either on ASRock's website or your product manual. Some are listed as ranges: 00 - 19 for example or 31 - 3b where in 3(x) x can be any integer from 1 to b (1-9 then a then b) https://www.asrock.com/support/index.asp?cat=Debug" rel="nofollow - https://www.asrock.com/support/index.asp?cat=Debug Try clearing CMOS, you could just have some bad BIOS settings saved. If a regular clear isn't doing the trick try this: https://forum.asrock.com/forum_posts.asp?TID=630&title=how-to-clear-cmos-via-battery-removal" rel="nofollow - https://forum.asrock.com/forum_posts.asp?TID=630&title=how-to-clear-cmos-via-battery-removal If your last code is 00 that means no CPU detected, I doubt it however as code 00 is the very first code in the POST process, no other codes would show if this one is failing. You should also check your power connections to the motherboard and reseat the CPU if you still can't get the system to POST. While the CPU is out double check for bent pins and dirt/debris in the socket or on the CPU contacts. Good luck. ------------- 
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Posted By: Ash
Date Posted: 06 Feb 2025 at 1:20am
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Thanks for response. I have only checked 12V coming to CPU and it was fine. For the rest need to dismount PSU to have an access to the connectors. Regarding POST codes in the manual - unfortunately most of them are not specified in the User manual for the motherboard. PC was working fine after latest BIOS update. I will try to reseat CPU and erase CMOS. Lets see what will happen. Thank you |
Posted By: Ash
Date Posted: 06 Feb 2025 at 3:35am
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Unfortunately CPU reseat didn't help. After power up the code sequence is as - 00 7F 19 00 C0 15 00 12 28 Appreciate if someone can help with codes which are not described in the Taichi Lite Z790 user manual. I am afraid that CPU can be faulty due to known issue with GEN 13/14 Intel Core i7i9 proc. Therefore the proper detection of problem needs to be done before Intel will be contacted for CPU replace (extended warranty). CMOS reset is ongoing and followed by PSU tests. |
Posted By: Xaltar
Date Posted: 06 Feb 2025 at 5:35am
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The codes are sequential, even if they are not all listed. Seeing as 28 falls between CPU and RAM in the chart I linked that would be a CPU or RAM related code, likely the memory controller but it could also be that your RAM is bad or isn't inserted firmly enough or there is debris in slots. You can try removing the RAM and powering on to see if the codes change. If so then reseat them, if not then it's likely the CPU's memory controller could be dead and as such is unable to initialize the RAM (acts like none is installed). Good luck. -------------
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Posted By: Xaltar
Date Posted: 06 Feb 2025 at 5:37am
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Also, if you have not tried already, power on the system and leave it on for 10mins at least. It could just be RAM training taking a long time, it can happen sometimes but should revert to quick POST times once complete. -------------
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