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J3455M powering on-off-on before booting
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demetris View Drop Down
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    Posted: 15 Dec 2016 at 12:54am
I have the J3455M motherboard and when I press the power button to turn the PC on, the board will power on, then off (and sometimes off and on again) before finally booting. This happens when:
1. I power it on after the power has been completely cut off from the psu
2. I make a change in the BIOS and save
3. I force the PC to shutdown by holding the power button

This wouldn't have been much of an issue if the hard disks did not power on and off as well. But I'm sure that this powering on and off is not good for them because the power goes off right after they start spinning.

Does anyone else have the same problem with J3455M? I have noticed another post about a different motherboard but not this one. Is this normal or is my motherboard defective?

I have already sent two emails to Asrock tech support and I'm still waiting for a reply.
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wardog View Drop Down
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Points: 6447 		Post Options Post Options   Thanks (0) Thanks(0)   Quote wardog Quote  Post ReplyReply Direct Link To This Post Posted: 15 Dec 2016 at 2:56am
Please list out the components that make up your computer, by make and full model number.

Is this a new build? Or one that's been running fine and only now doing this?
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demetris View Drop Down
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@wardog Thanks for replying.

It is a new build. All the other components were taken from other working PCs I had.
RAM: G.Skill Sniper F3-1866C10D-16GSR 2x8GB
PSU: Coolermaster RS400-PSAPI3
HDD: doesn't really matter as the problem exists even without any disk connected
Case: Fractal Core 1000

I should also mention that I tried all the settings in the BIOS regarding CPU power states and adjusting the RAM speed. I have also tried booting into Windows 10 and once it boots it seems to be running fine. I only had problems with some Linux distros that either refused to install (freezing during installation) or the installation and boot was taking forever but I think that may have to do with the CPU (and platform) being too new and perhaps unsupported yet.
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wardog View Drop Down
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Points: 6447 		Post Options Post Options   Thanks (0) Thanks(0)   Quote wardog Quote  Post ReplyReply Direct Link To This Post Posted: 15 Dec 2016 at 1:17pm
Phew. That PSU dates back some time huh?

If I were you I'd swap in a "newer' and capable PSU to test. I'm guessing you got your mileage out of that one. Wink
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demetris View Drop Down
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Yes it is a bit old but was actually rarely used all these years so I was hoping I could use it. It is ATX 2.31.
Thank you for the suggestion, I have a newer EVGA 500B I can swap in and see if that solves the problem. I'm wondering though if others that had similar problems with their Asrock Apollo Lake motherboards were also using an older PSU. Anyway I'll find out I guess if it is indeed a PSU incompatibility or not and I'll reply here with my findings.
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wardog View Drop Down
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Points: 6447 		Post Options Post Options   Thanks (0) Thanks(0)   Quote wardog Quote  Post ReplyReply Direct Link To This Post Posted: 15 Dec 2016 at 2:09pm
Originally posted by wardog wardog wrote:


If I were you I'd swap in a "newer' and capable PSU to test.


To clarify .......

"Capable" meaning unless you have a backplane loaded with HDDs 400w should be plenty.
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wardog View Drop Down
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Originally posted by demetris demetris wrote:

I'm wondering though if others that had similar problems with their Asrock Apollo Lake motherboards were also using an older PSU.


Yours currently is loaded heavier on the +3.3v rail than the +12v. The "new', used loosely as it's been quite a few years now since changing, motherboard standard is more loading on the +12v rail. Newer boards depend heavily on the 12v rail now.

Is it others cause? I can't really say.

What I will say though is inadequate PSUs are a regular problem that we answer/discover here. It seems folks upgrade their Athlon 2 systems to a Z170 or 990FX and then add a GTX 1070 yet wonder why their computer isn't working.

ie: Many don't consider their PSU when upgrading. And I mean a lot.

My motto: Consider the PSU the foundation of your system. Anything built on a poor foundation cannot be deemed trustworthy
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demetris View Drop Down
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Points: 10 		Post Options Post Options   Thanks (0) Thanks(0)   Quote demetris Quote  Post ReplyReply Direct Link To This Post Posted: 16 Dec 2016 at 1:48am
After a bit of a hassle I swapped in the EVGA 500B and unfortunately the problem remains. What's even weirder is that now the problem seems to be happening even after a regular shutdown and on top of that it goes through the on-off-on power cycle twice before booting. This really can't be normal. My only concern now is whether I should bother replacing this with a new one hoping that mine is defective or look elsewhere assuming that all of them have some weird bug.
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demetris View Drop Down
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I tried booting Linux from a usb stick and shutting down a few times to see what happens. After a few attempts, the board refused to POST and the PSU's fan started revving up. After this, I'm not gonna bother anymore with this particular board.

@wardog Thank you very much for your support.

Unfortunately Asrock tech support has not replied yet (after one week from my first email).
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wardog View Drop Down
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Points: 6447 		Post Options Post Options   Thanks (0) Thanks(0)   Quote wardog Quote  Post ReplyReply Direct Link To This Post Posted: 16 Dec 2016 at 2:20am
Look closely at the case wiring to mobo System Panel header that the wiring is correct.
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