ASRock X370 ITX won't POST

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allerka

Feb 15, 2018
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Hi everyone. So I just got a custom system from Cyberpower, with the ASRock X370 ITX motherboard. My other specs include:

CPU: AMD Ryzen 5 1600
RAM: 32 GB of DDR4-3200
Video: Gigabyte GTX 1080
PSU: Corsair SF450
Storage: 256 GB M.2 SSD, 3 TB HDD

I unboxed the system, connected it to a TV with an HDMI cable and fired it up. Everything seemed to be running fine. I poked around the BIOS, looking at all the different options available (WAY more than I'm used to seeing). The only things I changed was to set the RAM to 3200 speed, and adjust the fan speeds. I reset it to verify the changes, still booted fine. I proceeded onwards to install Windows 10 from scratch on the M.2 drive. Once it was installed, I reset the system a couple times to marvel at the boot speeds (5.5 seconds for Windows to load!) before realizing it was time for work. So I powered down the system normally, and went to work.

When I got back a matter of hours later, I went to turn the system back on. Nothing came up on the display, but the fans and drives were spinning up. After about 28 seconds, the system shut down for about one second, then started back up and repeated this process until I turned it off. At no point did anything show up on screen. Sufficed to say, this was very confusing, since nothing had happened to the system while I was gone (I live alone, so no one could have fiddled with it).

I opened it up and triple-checked all the connections to no avail. I unplugged the system completely, let it sit, plugged it back in to a different wall outlet. No change. Eventually I tried clearing the CMOS jumper. Once that was done, the system no longer shut down on its own, but nothing was coming up on the display still. I tried the stock RAM chips instead of the upgrades I bought, made sure my video cable and display were working fine, tested both the video card and onboard graphics, starting it with the bare minimum components plugged in. I also tested the video card in my old system, and it works fine. I connected my old system's PSU to the X370 and still got nothing to come up. By process of elimination, that leaves the problem as sitting with the motherboard or CPU. Given I've found a number of threads around the web of this problem happening to others, I'm inclined to think it's the motherboard.

I did NOT update the BIOS in any way, nor change any settings beyond the RAM and fan speeds. I would think clearing the CMOS would have reset those to default values anyway. I would have also removed the battery, but this board apparently doesn't have one.

Anyway, I contacted Cyberpower tech support as well, and they're pretty stumped too. I thought I'd try asking an experienced community for any last ideas before I ship the system off on an RMA. It's definitely disappointing after paying as much and waiting as long as I did on this thing, especially since my last Cyberpower system is still running just fine after eight years of near-continual use (actually using it to type this up).

Oh, one last thing tech support brought up. All my fans and lights still turn on, but pushing Caps/Num Lock on the keyboard doesn't trigger those lights. So it's not a matter of no video data being sent out, I think it's the BIOS isn't even POSTing. If you folks have any ideas, I'd be quite grateful. Thanks!
 
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Right, lets see if I can help:
That pic of the motherboard, the X370...........The CMOS jumper is hard to see on this, but next to the securing clip wings on the end of the PCIE slot, the end with the long section of slot. Lift the jumper off and after xyz time replace. I say xyz because you will be given various times.......I give it at least 5 minutes to be sure....then replace jumpers as they were........
The CMOS battery..........Not practical to lift out on this MB, it is in a shrink fit plastic sleeve which has to be cut to replace the battery. So........now pay attention here: Back to the PCIE slot, this time on the left, the short slot .....Look just above this slot, a round cap, with a quarter grey section, and above that...
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allerka

Feb 15, 2018
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What battery? As far as I can tell this thing doesn't have one. There's no reference to it in the manual, I've checked under the chipset heatsinks, there's nothing. I think if I want to fully clear it, I need to pull the BIOS ROM out.

But I'll give the jumper another shot.
 
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connorknopp34

Feb 14, 2018
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Theres a little C battery on the board, usually near the PCI lanes.. Just pop it out for a minute.

Not too long ago i was in your situation tho, I had the ROG Strix (b350) and when i enabled the XMP Ram profile it didnt post, so following normal procedure I reset Cmos and it never turned back on after a few days worth the trouble shooting, The ram works but for some reason the board wasnt outputting a display. i ended up RMA'ing it only to receive a dead board back.

 
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allerka

Feb 15, 2018
3
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Fatal1ty%20X370%20Gaming-ITXac(L2).png

Not trying to sound sarcastic, but please show me where on there the CMOS battery is.

I tried flipping the jumper, no change. It just sits there with the lights on, the fans blowing (though their speed keeps oscillating for some reason). Grr, this is frustrating, especially because I used to fix problems like this professionally!

The weird thing is it worked fine at first when I loaded the XMP profile to run the RAM at 3200 instead of 2400, it's just when I left it off to go to work and came back it quit on me, and even putting the stock 2400 chips back in isn't helping.
 
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stree

Reputable
Dec 12, 2014
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4,520
Right, lets see if I can help:
That pic of the motherboard, the X370...........The CMOS jumper is hard to see on this, but next to the securing clip wings on the end of the PCIE slot, the end with the long section of slot. Lift the jumper off and after xyz time replace. I say xyz because you will be given various times.......I give it at least 5 minutes to be sure....then replace jumpers as they were........
The CMOS battery..........Not practical to lift out on this MB, it is in a shrink fit plastic sleeve which has to be cut to replace the battery. So........now pay attention here: Back to the PCIE slot, this time on the left, the short slot .....Look just above this slot, a round cap, with a quarter grey section, and above that, a pair of twisted wires, red and black, plugged into a white connector block on the motherboard.............The other end of these wires is the CMOS battery, the round black item glued to the back of the Nichicon Audio port.... Got it? So to disconnect the CMOS battery, you just lift the white 2 pin connector end from the connector block on the motherboard, and again wait for xyz amount of time..........
But, To PROPERLY clear the CMOS, first power down.................then remove kettle lead, mains power in.. then hold in the strt button on the pc for minimum 30 seconds...............then remove CMOS jumpers and disconnect the CMOS connector block..............Be patient.......I give at least 5 mins so any stored charge in capacitors can disperse. The charge holds the "memory" the cmos charge is there to provide this charge to "keep" the memory. Your job in clearing CMOS is to totally get rid of this memory, so it is very poor practice to rush this task and expect good results......
There you have it: How to clear CMOS on the X370 Fatality gaming itx.....Then reconnect, power up and carry on.

and do not fiddle with the BIOS just because you can..........and only if you know how to rescue yourself when things go wrong....
 
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