[SOLVED] PC doesn't boot in cold days or mornings

[Hector_1]

Hi!
I have a pc from 2017:
Asus B350 strix
Ryzen 7 1700
16 gb (2x8) Hyperx fury 3200MHz
850 evo 500 SSD
Zotac GTX 1060
Corsarir HX750i

My system worked perfectly for the first 2 years, but last year it started to have problems to boot in the cold mornings or nights, I can only get it to boot if a warm it up with a hair dryer or with the sun in a window. To avoid this I started to leave the PC in sleep mode, for several months I don't have problems with this, the system started again without problems, but few weeks ago, that method stopped working, if I leave it in sleep mode it doesnt start and I have to warm it up again. If I get it to boot the system doesn't have any problems running, no restarts, no crashes but is a nonsense having to warm up a pc to boot even if the system is in sleep mode.

 

[jay32267]

My first thought is the power supply.
When you go to start it when it's cold and you press the power button does the power supply come on?

 

[Hector_1]

My first thought is the power supply.
When you go to start it when it's cold and you press the power button does the power supply come on?

I can't verify the activity of the psu when the system is off or failing to start because its fan doesnt turn on until certain load, but the motherboard have a standby power LED that is always on when the psu is connected

 

[jay32267]

Do you get MB activity when you press the button? Does the GPU light up (if it has a light)? Do the case fans come on?

 

[Hector_1]

Do you get MB activity when you press the button? Does the GPU light up (if it has a light)? Do the case fans come on?

No, nothing happens, no fans, no gpu light, no more motherboard lights aside for the standby power led that is always on, only boots if I warm the motherboard, when it happens all start without problems, fans, lights, gpu and cpu fan, and gets to windows. Also I have a nzxt s340 case, the psu is in under a shroud so, I dont know if the heat reach it when I use the hair dryer or the sun in the window.

 

[helper800]

No, nothing happens, no fans, no gpu light, no more motherboard lights aside for the standby power led that is always on, only boots if I warm the motherboard, when it happens all start without problems, fans, lights, gpu and cpu fan, and gets to windows. Also I have a nzxt s340 case, the psu is in under a shroud so, I dont know if the heat reach it when I use the hair dryer or the sun in the window.

I speculate that it is the PSU cables that you are heating. Sometimes cheap PSUs come with cables that are not so great. I would buy a quality PSU from a local electronics store to test. If your computer works as is should keep the new PSU, if the computer has the same issues return the new PSU and post back.

 

[jay32267]

Then I might try this.

View: https://www.youtube.com/watch?v=Ea1dcJ0QyAE


If the PSU starts when you do this...I would suspect the motherboard or the power switch. If it doesn't I would suspect the power supply.

 

[Hector_1]

Then I might try this.

View: https://www.youtube.com/watch?v=Ea1dcJ0QyAE


If the PSU starts when you do this...I would suspect the motherboard or the power switch. If it doesn't I would suspect the power supply.

I tried this and the psu worked, also I test it with another motherboard and it start whitout problems (in the same wheather / conditions), so I replace de motherboard, later I read that the reason of that behavior are mosfets or another chip, like the ite or nuvoton, even the chipset itself in short circuit, it can be verified with a voltmeter, sadly I dont have one to verify by myself that.

 

[jay32267]

I tried this and the psu worked, also I test it with another motherboard and it start whitout problems (in the same wheather / conditions), so I replace de motherboard, later I read that the reason of that behavior are mosfets or another chip, like the ite or nuvoton, even the chipset itself in short circuit, it can be verified with a voltmeter, sadly I dont have one to verify by myself that.

Good to hear.

 

[Llamaman]

I'm the same on a cold morning. Usually takes 2 mugs of tea to get me working.