Computers fails to start, is it CPU or PSU? Need help from ppl with experience

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J

Just a Breeze

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Jun 11, 2016
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Whenever I have a computer hardware-related issue, i've always counted on this website's community to get the answers i needed, but this is the first time posting a problem since i couldn't find anything related to what is happening.

So, my computer fails to start. But the thing is, to get it to run again, i'd have to unplug the power cable from the PSU and take out the motherboard battery to reset my CMOS and wait about 15 minutes. If i don't do this, nothing happens. There's no beep from the motherboard even after i did all the troubleshooting which includes taking out each component one by one and trying to start it. Which leads me to believe its the PSU. But, I've already done the PSU test by sticking a paper clip into it to see if it works and it does so without any problems. So it could be a problem when the PSU is underload, but the thing is, I've played heavy games that require a lot of CPU and GPU power, and its still fine. It might be the power switch then, but why would it start fine after i take the motherboard battery out? Plus i double checked by connecting the pins where the power switch plugs into. Oh and yes, the system is completely grounded, I've breadboarded it before.
Once the computer is on after i've done the ritual said above, the computer beeps fine as if nothing happened, it does make me press F1 though, just to go to the BIOS setup. One thing i would like to mention is that this occurred about a week after i updated my BIOS, I would like to believe it was a coincidence because from experience i wouldn't know why a BIOS update would make a computer fail to start, let alone beep.

Can someone please tell me what i should take back to the shop to reclaim? The motherboard or the PSU?

Update: I turned off my computer about an hour ago to go grocery shopping, before i did i shutdown my computer and tried turning it on again, same outcome, so i took out the battery as i do and left. Came back, plugged in power cable and battery, the power came on for half a second and went off. Thought to myself its finally dead. Pulled the power cable out plugged it back in while not noticing my finger still on the power button, and it turned on now. wtf?! Too scared to turn my computer off now..need help please
 
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zezuzaza

zezuzaza

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Dec 17, 2016
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Q1: You already test the PSU and did the fan working?
Q2: Why you update the BIOS in the first place? Is there any problem to that mobo that you need an update?

For you information, if you start update your BIOS, the problem will occurred. Never update BIOS even once. Please use that comes from the factory itself. Updating BIOS is you programming back your motherboard. You cant claim warranty if you installed BIOS update new version. Warranty must hand over them like the same thing you purchase meaning that you must have to install same firmware version BIOS that comes when you received you mobo out of the box.

PSU warranty only cover physical damage
 
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Dunlop0078

Dunlop0078

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Feb 13, 2014
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I doubt hardware is causing this, I would guess something is screwed up in the bios but I haven't a clue what. When you clear the CMOS you are essentially resetting the bios back to default, why you would need to do this every time you shutdown your pc is a mystery to me I will try to look it up.

Responding to the above poster I dont believe updating the bios on any motherboard with a bios made by the manufacturer would void any warranty, sometimes its necessary to update the bios, I wouldn't do it for no reason but its not going to void your warranty if you do.
 
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J

Jan_26

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Jun 30, 2016
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Neither me (update voiding warranty)... I used to have summer jobs in computer store and never encountered this. Plus as Dunlop0078 says, for compatibility or fixes of some issues you simply have to perform the upgrade.

Just for case, try replacing the battery with a new one.
 
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J

Just a Breeze

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Jun 11, 2016
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Q1: Everything was working as it should be including the fan
Q2: I updated it cuz i'm usually an update freak, and with the promise of "Improves system performance" in the update details, I'd trust them enough to update. In my experience i've never had any problems updating my BIOS until possibly now, where the BIOS update release date was December, 2016 and from my experience, new updates sometimes have bugs. My fault for not looking at the release date earlier.
 
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J

Just a Breeze

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BTW, i have the same PSU as you, Seasonic 550w g series. Oh and i updated my original post on what happened please read aswell
 
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J

Just a Breeze

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The motherboard is relatively new H170 pro gaming (less than a year old since i bought it), i doubt they'd give me an old/faulty battery, but there's always a chance it could be, so will find one if i can find one.

 
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SgtScream

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Dec 8, 2016
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I would suggest going out to your local computer hardware store and pick up a power supply (Path of least resistance in your next step of troubleshooting). You don't have to take the old one out, unplug it and hook up the new one to see if your computer functions properly. If the issue replicates, just return the new power supply. The only sure fire test, to test the power supply is by temporarily replacing it. NO other test is as 100% effective. Also, if your bios keeps time properly, I doubt your cmos battery is at fault.
 
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J

Just a Breeze

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Jun 11, 2016
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So i got another update, and it changes the dilemma a bit. I now realize from a few tries that i don't have to take out the battery and setting my time anymore. All i need to do is hold the power button while plugging in the power cable into the PSU simultaneously. I don't know if i could break my computer by doing this but by doing this the computer starts and keeps the time and all my settings. This must mean it is either a bad power switch or a faulty PSU. i'm thinkin about takin the computer to a shop like u said and borrow a power switch before trying a new PSU, What do you think?
 
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J

Jan_26

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Jun 30, 2016
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If you can borrow the PSU, definitely try that since it starts to sound more and more like faulty PSU. I don't think it would be a button issue, but you can avoid using it for the test... just shortcut power btn pins on your motherboards (small screwdriver will do)... As for pushing the button while plugging in the cord... I can't recommend it, with a good PSU, it shouldn't hurt much, but with a bad one, it's a bit risky.
 
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