PC keep turning on itself, but rarely turning on on purpose

[Jonathangp]

I had just bought a new pc. Sometimes it can turn on but most time it can't.

Here are the specs:
-CPU: i5 6400
-GPU: Colorful gtx 1050
-Ram: 2x4 gb at different clockspeed
Motherboard: Asus H170 Plus D3
PSU: Dazumba 600w 80+ bronze
HDD: WD 500gb

A few daus ago i had a different PSU. And it had a same problem. I asked to my local computer stpre, but they said it doesen't had any problem, because in their place it runs normaly. The intresting is the mobo light is turn on green, but still when i tried pressing the power button sometimes its on, mostly its not.

Doest anyone have a solution?
Btw thanks

 

[Aeacus]

My best bet would be your PSU.

I have never heard about Dazumba PSUs.
Took me some searching to find the manufacturer's webpage,
link: http://dazumba.com/?p=catalog&action=viewimages&pid=78&cat_id=47#.WG3FMX12pv0

Looking the webpage, it only took few seconds for me to know that everybody should avoid Dazumba PSUs.
Why? Because Dazumba hasn't provided any info about PSU rail amperage, wattage and combined power. Without technical specifications, there is no way to say if this PSU even outputs the 600W printed on it's sticker.
To top all of it off, Dazumba is a company that focuses on making audio speakers.

For proper PSU, take a look at Seasonic's webpage,
link: https://seasonic.com/product/m12ii-520-evo/

You can see all the necessary information about PSU. Amperage, wattage, MTBF, dimensions etc.
Seasonic is the oldest and one of the best PSU OEMs in the world. They have been in business for over 40 years and they also make PSUs for such famous companies as: Antec, Cooler Master, EVGA, Fractal Design, SilverStone, XFX. (E.g EVGA Supernova GS series PSUs are made by Seasonic.)

All my 3 PCs: Skylake, Haswell and AMD are also powered by Seasonic. (Got PRIME series in Skylake, M12II EVO series in Haswell and S12II series in AMD. Specs in my sig.)

Here's PSU Tier list: http://www.tomshardware.co.uk/forum/id-2547993/psu-tier-list.html
For new PSU, aim for a good quality Tier two PSU, preferably great quality Tier one if you could afford it.

Anything from Seasonic is great. For your PC a 500W will do just fine. Like the 80+ Bronze, fully modular M12II-520 EVO i linked above.

 

[Jonathangp]

But i saw people using much heavier pc than me that still using this PSU, and they had no problem.

 

[Aeacus]

First time i hear that the weight of the PC has anything to do with how the PSU operates.

Just because you saw this PSU work fine on someone else's PC doesn't mean the PSU is of good quality nor does it fix your problem.

Currently, your PSU decides when it want's to work and when it doesn't want to work. To me, that shows your PSU is of terrible quality. You should control the PSU not the other way around. Also, when low quality PSU decides to die, it can take some if not all your PC components with it. If you're lucky, you can even see nice fireworks too when your PSU goes out.
Like seen here: https://www.youtube.com/watch?v=Ezk9OA7aKOE

Last i checked, a good quality PSU costs far less than replacing the entire system.
If you care about your system and want to control your PSU, use a good quality (Tier two) PSU. If not, keep using your moody PSU.

 

[Jonathangp]

What i mean by heavier is, it has much heavier power consumption.

 

[Aeacus]

Basically, if the PSU doesn't perform as it should, RMA it and get a replacement.
As far as i read from Dazumba's website, this PSU has lifetime warranty.