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J3455M powering on-off-on before booting
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nocny View Drop Down
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    Posted: 23 Dec 2016 at 12:50am
In my case (I have j3455-itx) proper clearing of the cmos and enable of csm (all 3 settings for uefi) Solved the problem, now it powers off and on only after saving bios.
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Originally posted by Aristoc Aristoc wrote:

Originally posted by nocny nocny wrote:

I have the same issue with J3455-itx (P1.10), my psu is 480W Tagan model: TG480-U01. I think that this is a bios/uefi issue. 
I could be way off target but this wouldn't be something to do with the deep sleep mode setting in BIOS ? For me changing to S4-S5 solved it. (I have a different MOBO). 

@nocny Yes it may be a BIOS issue that could be fixed with an update but unfortunately mine has now gone to the next level where it refuses to POST etc even with the EVGA PSU which should be more than capable (not being too old) to power it. Not to mention that it would be okay if hard disks where going through the power cycle only on cold boot, but definitely not for normal boot.

@Aristoc I have tried any setting I could find in the BIOS regarding deep sleep modes and other CPU power settings but it didn't fix my problem. After searching a bit online I found similar issues with an older Intel platform and is really weird that this problem still exists with Apollo Lake (as it seems).
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Originally posted by demetris demetris wrote:

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.

Originally posted by nocny nocny wrote:

I have the same issue with J3455-itx (P1.10), my psu is 480W Tagan model: TG480-U01. I think that this is a bios/uefi issue. 


I could be way off target but this wouldn't be something to do with the deep sleep mode setting in BIOS ? For me changing to S4-S5 solved it. (I have a different MOBO). 


Edited by Aristoc - 17 Dec 2016 at 12:21am
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I have the same issue with J3455-itx (P1.10), my psu is 480W Tagan model: TG480-U01. I think that this is a bios/uefi issue.
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Originally posted by wardog wardog wrote:

Look closely at the case wiring to mobo System Panel header that the wiring is correct.

They are correct.
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Look closely at the case wiring to mobo System Panel header that the wiring is correct.
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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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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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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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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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