Cannot get past bios screen on Z170 extreme4
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=3892
Printed Date: 22 Jul 2025 at 5:47am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: Cannot get past bios screen on Z170 extreme4
Posted By: asrockasrock
Subject: Cannot get past bios screen on Z170 extreme4
Date Posted: 28 Nov 2016 at 9:13am
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Good morn! I am using the Z170 extreme4 + 6600K in a fresh build and whenever I power it on, I get prompted to update my CMOS time and after going to the BIOS to do that, whether I save the changes or not, the next bootup will result in absolutely no video anymore so no POSTing or anything... and usually the Dr. Debug error code will be 19 but it has varied. Whenever this happens, usually the computer will turn on and turn off for a few seconds each and eventually setting on staying on while not showing any video. Then if I leave the computer alone and reset the CMOS a few times and unplug everything, I can turn it back on and get to the BIOS screen once more, only to have the same scenario repeat. Please advise!
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Replies:
Posted By: wardog
Date Posted: 28 Nov 2016 at 10:41am
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What memory is it you're using? Matter of fact, go ahead and list out all the components that make up the computer. Too, you haven't overlooked plugging in the 8-pin CPU power located at the upper left of the board have you?  |
Posted By: asrockasrock
Date Posted: 28 Nov 2016 at 11:23am
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" rel="nofollow - Haha no I have not overlooked the CPU power thankfully! When I do get to the bios screen, I can see the 6600K detected along with its cooler's RPMs. For the memory I have 16gb of http://www.newegg.com/Product/Product.aspx?Item=N82E16820011114 but I have tried it with just one stick and both in all sorts of configurations. During one of the occassions when I could get into the BIOS, I tried booting to Memtest from a flash drive but it again went to a completely blank screen and sat there forever. Right now I am going through the onboard GPU since I intended on ensuring this build worked before dismantling my older, current PC and taking the RX 480 out of there. And I have tried with an Intel SSD but it never even gets close to loading up the hard drive from what I can tell. Thanks for the quick reply. :D
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Posted By: wardog
Date Posted: 28 Nov 2016 at 2:07pm
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" rel="nofollow - Avexir. They don't author QVL Qualified Memory. Yet I did just look in ASRocks Memory QVL and do see "AVD4UZ124001608G-2xxx/4xxx" listed , which is the memory you have there. Hmmmm If you haven't yet, place them in A1 and B1 and test. But clear the BIOS using the back button before booting soo that the BIOS is back to UEFI Defaults. What PSU is it you have and how old is it? Reseat the 24pin and 8pin power. Also, do this diagnosing with nothing connected to the MB other than bare necessities to enter the BIOS(CPU and mem), using the 6600Ks IGPU for graphics output. This way rules out a lot that may only serve to confuse while diagnosing. Keep posting your findings. |
Posted By: Xaltar
Date Posted: 28 Nov 2016 at 2:16pm
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What Wardog said. Generally when the system boots straight into the UEFI it is because the board does not like one of your settings, if that setting is a default value it is most often the RAM causing it. The "boot to UEFI" on power on is akin to windows Safe Mode, it loads settings that are most likely to result in the system working, at least in so far as getting into the UEFI itself. The RAM may require slightly higher VCCIO or VCCSA voltages for example and if you don't increase these before you save and exit the system will fail to post. You could try increasing VCCIO and VCCSA to 1.15 and see if that gets you posting/booting consistently. If after you have tried what Wardog and I have suggested you still can't get the system up and running I would try a different module of RAM, preferably one listed as supported by the board on either ASRock's QVL list or the RAM manufacturers. ------------- 
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Posted By: asrockasrock
Date Posted: 29 Nov 2016 at 8:43am
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" rel="nofollow - Thank you both for your responses! I have definitely tried testing it with nothing other than the RAM and CPU installed... in fact that is how I started testing it and thought maybe the BIOS was looking for a drive so then I hooked up the SSD but did not see any different results obviously. I cleared the CMOS quite a few times and tried as many strange combinations of using the jumpers and removing the battery as I could think of. What do you mean using the back button before booting? Very interesting to think of the UEFI boot-up as a 'safe-mode' start. I certainly did not modify any voltages for anything at all so that is one option I will experiment with when I get a few free hours (likely tomorrow). You say increase it to 1.15... Is there a way to tell what the stock voltage would be? I see on the product page for the RAM it says Voltage 1.2V. If nothing else works I will try to find a cheap RAM module locally so that I can rule that out as well. Again, thank you both so much!
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Posted By: asrockasrock
Date Posted: 30 Nov 2016 at 7:18am
| " rel="nofollow - Also, do you think it could maybe be an outdated BIOS issue? I am on 3.30, which appears to be two versions behind. I guess I have nothing to lose when it comes to updating it, right? |
Posted By: wardog
Date Posted: 30 Nov 2016 at 7:49am
Do so. BUT, use the Instant Flash means from within your BIOS. DO NOT use the App Shop nor Internet Flash. Download the Instant Flash file, unpack it to the HDD, copy it to a FAT32 formatted USB thumb drive, insert the thumb drive into a USB 2.0 port at the rear I/O ports, reboot, enter the BIOS and located under Tools Instant Flash, click on it and with the BIOS file shown on the popup, hit the Enter key. She'll take off and update the BIOS. Leave the USB thumb drive in the USB port all through updating until rebooting dumps you to the Windows log in screen or whatever you have configured there. But DO NOT remove it until you arrive upon your Windows desktop. |
asrockasrock wrote:Posted By: asrockasrock
Date Posted: 30 Nov 2016 at 8:33am
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Thanks for the great walkthrough! I will do just that, minus the arriving at a windows desktop since I haven't made it that far yet so I won't have windows installed yet... so when do you recommend I remove it in order to boot to a windows installation flash drive? EDIT: And also, do I need to upgrade to the next BIOS version or can I skip straight to the most recent?
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Posted By: wardog
Date Posted: 30 Nov 2016 at 8:59am
Good question. With no OS yet, with the first initial reboot after flashing the BIOS, reboot it one more time in succession, immediately after the first time using Instant Flash to update. DO NOT flash the 7.xx BIOSes. The 7.xx BIOSes address ONLY Kaby Lakes release and so far have been known to cause issues to all out wreak havok when used with the current Skylake processors installed. No Kaby Lake as your currently installed processor, NO 7.xx BIOS! And no. There's no need to jump hoops on each successive BIOS release. All the updates from one revision upwards are carried over. |
Posted By: asrockasrock
Date Posted: 30 Nov 2016 at 10:25am
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Ok awesome! I was going to put that newest BIOS on there so I'm glad I dodged that one haha and I will flash it then reboot it a couple times immediately after and hope for the best. Thanks again!
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Posted By: asrockasrock
Date Posted: 29 Dec 2016 at 3:32am
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I apologize for the long wait for a reply... I was very busy during the holidays. So I was able to get into BIOS -> Instant Flash to 3.40 and after it said the update was successful and it was time to restart, I did that and the system again hung on Dr. Debug error code 19. :(
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