Question My PC doesn't turn on after a BIOS change ?

[Olinoobra]

I just saved two profiles and restarted my pc then it went full black I couldn't go to bios not even backup bios because keyboard wasn't working. I tried resetting cmos, shorting cmos, cleaning ram nothing is working

My specs:
Intel Core i5 4460 Haswell Refresh
Gigabyte H81M-DS2-C rev 1.0
4 gigs of ram
No gpu

 

[boju]

Pull the power plug from back of the psu then push and hold case power button for good 10 seconds. After that, remove cmos battery for 5 minutes. Once 5mins elapses put cmos battery back (+ side up) and short the clear cmos pins. Overdoing it here i know but want to make sure cmos is properly reset, via removal of cmos battery or clr cmos pins, sometimes it matters which.

Discharging power via holding power button whilst no power cable is connected should be enough and an assured way of clearing cmos when removing battery because sometimes, too, capacitors on motherboard and psu can still hold power and compensate lack of cmos battery.

 

[Olinoobra]

Pull the power plug from back of the psu then push and hold case power button for good 10 seconds. After that, remove cmos battery for 5 minutes. Once 5mins elapses put cmos battery back (+ side up) and short the clear cmos pins. Overdoing it here i know but want to make sure cmos is properly reset, via removal of cmos battery or clr cmos pins, sometimes it matters which.

Discharging power via holding power button whilst no power cable is connected should be enough and an assured way of clearing cmos when removing battery because sometimes, too, capacitors on motherboard and psu can still hold power and compensate lack of cmos battery.

Well its still not turning on

 

[boju]

There's no power at all? No lit leds?

 

[Olinoobra]

There's no power at all? No lit leds?

There is. Its now what I will say its bootlooping like I turn it on now it will turn on then turn off then on then off. What I am gonna now

 

[Olinoobra]

There's no power at all? No lit leds?

And it's making a weird sound after turning off

 

[kira-faye]

One stick of RAM, make sure it's in the correct slot (don't assume, look in the motherboard manual), disconnect all drives, just enough to get video. If it boots, start adding things back till you get a problem again. If not, do you know anyone local who can help or do you have any backup components that could be swapped in, even just for testing? Gotta eliminate things one by one.

 

[boju]

And it's making a weird sound after turning off

What are the profiles you're talking about in your OP?

What's your psu model?

Did you remove ram at all to troubleshoot? As above, correct slot, usually 2nd slot from cpu and make sure it's fully seated that the clips lock in.

 

[Olinoobra]

What are the profiles you're talking about in your OP?

What's your psu model?

Did you remove ram at all to troubleshoot? As above, correct slot, usually 2nd slot from cpu and make sure it's fully seated that the clips lock in.

Well I am talking about bios setting profile in old gigabyte bios'es

Psu is some cheapo Value top 200w t200b Psu installed by my some repair shop

Well did that now its seem to be doing something but still bootlooping

 

[boju]

Now try clear cmos.

Still not sure what you mean by profiles. What exactly did you do?

Psu could be the culprit too, but bit of a coincidence so not convinced to go there yet albeit is something to consider.

 

[Olinoobra]

One stick of RAM, make sure it's in the correct slot (don't assume, look in the motherboard manual), disconnect all drives, just enough to get video. If it boots, start adding things back till you get a problem again. If not, do you know anyone local who can help or do you have any backup components that could be swapped in, even just for testing? Gotta eliminate things one by one.

I Don't have any in hand

 

[kira-faye]

I Don't have any in hand

Then a local repair shop is, sadly, probably your best bet if reducing components to a minimum doesn't get you anywhere.

 

[Olinoobra]

Now try clear cmos.

Still not sure what you mean by profiles. What exactly did you do?

Psu could be the culprit too, but bit of a coincidence so not convinced to go there yet albeit is something to consider.

Profiles by I mean bios setting profile

Mean I have a bios setting and I want to save that but I want to do another bios setting so I can save the first profile then after trying the second setting then I can load the first profile(setting)

 

[Olinoobra]

Then a local repair shop is, sadly, probably your best bet if reducing components to a minimum doesn't get you anywhere.

I'll see if I can find some time to take pc to a repair shop

 

[kira-faye]

I'll see if I can find some time to take pc to a repair shop

Do what I suggested first - One stick of RAM, try every slot if you need to, disconnect all the drives and everything else except for the video card, so just enough to get a display and know if anything is going on. Then unplug it from the wall, reset the CMOS one more time, plug it back in and hit power, hope for the best.

If that wakes it back up the next step is to start adding things back, reconnect drives one at a time, install sticks of RAM one at a time, until you start having a problem again... Or if you're really lucky, everything just works.

 

[boju]

Profiles by I mean bios setting profile

Mean I have a bios setting and I want to save that but I want to do another bios setting so I can save the first profile then after trying the second setting then I can load the first profile(setting)

What were the settings you changed though? Memory, csm, uefi, what?

Not sure if cmos reset would wipe saved profiles, probably would.

Did you try update bios?

 

[kira-faye]

What were the settings you changed though? Memory, csm, uefi, what?

Not sure if cmos reset would wipe saved profiles, probably would.

Did you try update bios?

This. The board supports Q-Flash, so in theory at least you should be able to unbrick after a bad BIOS flash even if you can't get video output. Try that. Go to Gigabyte for directions, if you can't find anything I'll try to walk you through it.

 

[Olinoobra]

What were the settings you changed though? Memory, csm, uefi, what?

Not sure if cmos reset would wipe saved profiles, probably would.

Did you try update bios?

I changed uefi settings

I will try to update bios

 

[Olinoobra]

This. The board supports Q-Flash, so in theory at least you should be able to unbrick after a bad BIOS flash even if you can't get video output. Try that. Go to Gigabyte for directions, if you can't find anything I'll try to walk you through it.

Thank you bro I will try

 

[kira-faye]

Thank you bro I will try

Not a bro.

You can do it.

 

[Olinoobra]

Not a bro.

You can do it.

Ain't getting a video output now

 

[kira-faye]

Ain't getting a video output now

Did it go through the Q-Flash process? Did you recent reset CMOS after?

 

[Olinoobra]

Did it go through the Q-Flash process? Did you recent reset CMOS after?

No I can't even get to the bios to flash

 

[kira-faye]

Q-Flash uses a USB stick with the BIOS on it in a specific port on the board. If done properly there is no display output. Please read the manual for your motherboard and try again. If you feel that's beyond you, look for local help.

 

[TerryLaze]

There is. Its now what I will say its bootlooping like I turn it on now it will turn on then turn off then on then off. What I am gonna now

You could be lucky and it's just something touching were it shouldn't so it shorts out and resets all the time, but most probably your mobo just got too old and some component wore out.
Having a cheap PSU is not helping in keeping PC parts safe, and if the power isn't really steady wherever you live then it's even worse.