After PSU backswitch off I have a hard time to boot.

Airbender_Aang · Feb 23, 2017

I have a hard time turn on my computer after I switched off the PSU with its main switch.
Fans working, HDDs spin up, LED-s lighting, but I have no response from my monitor, only black screen. (my motherboard has no place for an onboard speaker that sucks)
I have to turn it off and have it laying there like that, (so I guess capacitors discharge) after it, it works again.
My main question is, can I make it stop by setting things in BIOS?
Other question is, what part of my computer is faulty?
I checked the volts of the PSU with a digital multimeter, everything seems fine.

Components are the following:
Motherboard: GA-F2A88XM-HD3
PSU: FSP ATX 400PNF
CPU: AMD A45300
RAM: CSX Diablo 2000mhz 2x2 Kit (running at 1333 mhz on 1.8 volts)

(sorry for my bad english)

Supahos · Feb 23, 2017

Best guess I have is CMOS battery won't hold a charge

Airbender_Aang · Feb 23, 2017

Supahos :

3 volts according to my multimeter.

The time remains the same, so the issue is not the CMOS battery.

Update: After switching to new 2032 battery, nothing has changed.

Airbender_Aang · Feb 24, 2017

Just checked with a 100% reliable PSU (FSP 550W) what powers my main system. The results are the same. I keep digging.

Supahos · Feb 24, 2017

Wait. Next time it does that turn your monitor off and back on. Not a real likely cause but maybe?

Airbender_Aang · Feb 24, 2017

Supahos :

When it happens the mouse and keyboard and LAN lights are off too.

Supahos · Feb 24, 2017

Ah okay so it is the computer not the monitor. How long do you wait between switch flip and button press?

Supahos · Feb 24, 2017

If waiting 10-15 secs after switch flip to power on doesn't work, I'm going to suggest a better quality power supply but it's hard to justify spending money on that cheap of a build to begin with

Airbender_Aang · Feb 24, 2017

Supahos :

As I mentioned before, I just tried it out with another fully functioning one. Still the same.

Airbender_Aang · Feb 24, 2017

Tried it out with another psu monitor ram. And i put the cpu to another mobo everything works fine. It seems there is something wrong with the motherboard.

Supahos · Feb 24, 2017

Try resetting the bios and see if I fixes the issue. Otherwise I think k you've found the issue

Airbender_Aang · Feb 24, 2017

Supahos :

How can I reset it? Does Clearing CMOS do it? I tried downgrading it from F7 to F4. It was pretty hard to reupgrade, because it froze a lot in BIOS. So basically the issue were gone, but another problem showed up. I even tried F8f beta, but the same no response problem occured. This mobo has double bios, an M_Bios and a B_Bios. Which is which, and how can I swap between them, or reset each?

Supahos · Feb 24, 2017

Usually there is a switch on the board for dual BIOS that swaps between them

Airbender_Aang · Feb 24, 2017

https://youtu.be/f2m7SgIcdzU
Here i recorded it. Notice when the mouse led and numlock lights the monitor responses othervise it is not.

Airbender_Aang · Feb 24, 2017

Any idea how can I check my BIOS versions? It says F7 but I don't know whether it's my main or backup bios. And I still have no clue how to switch between them.

Supahos · Feb 24, 2017

http://www.overclockers.com/forums/showthread.php/697533-GUIDE-Forcing-backup-BIOS-on-Gigabyte-motherboards

Airbender_Aang · Feb 24, 2017

Supahos :

Tried them. Well i will check the 1 6 pin short. I hope that works.

Airbender_Aang · Feb 24, 2017

Okay so I successfully copied the backup bios to the main bios. My backup bios is either corrupted or outdated. Whatever i cant even get access to bios now nor flash it to newer. It keeps freezes. Can i do something about it?

Update: Okay, after plenty of tries (about 500) turning off and on I managed to reflash the main bios to the one I had in the beginning. But at least I know, my Backup bios is faulty. Is there a way to flash B_bios from M_bios?

Airbender_Aang · Feb 26, 2017

Well, I was bored today, so I switched the B bios and M bios chips. Nothing has changed. Weird isn't it. I even tried to boot with only the M bios in. It booted well. I guess I should try it with the B bios only and see what happens.

After PSU backswitch off I have a hard time to boot.

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