New Personal PC Build not booting

[Brax]

Hi all,

 

Rebuilt my PC to give it some nice upgrades and i'm now using a larger case rather than a micro one and i'm having a weird issue where when I try to power it on the fans start to spin very briefly but then I hear what sounds like a switch in the Psu turn off and then no power. I've looked online and some have mentioned that perhaps the motherboard standoffs might be incorrect and causing a short? The PSU is very good quality and was working on Monday so I can't imagine it's that. Any ideas or steps I should follow? My plan when I get home was to just take it out the case with just the CPU and ram plugged in and try to get it to boot there first.

[Davit2005]

My first PC I built had a dodgy power switch so yep I'd defo go for removing as much as possible then slowly add things back. Even if something is new there is no guarantee it is not DoA.

[Dos_Box]

How old is the PSU? The standoff advice would have been the starting point I would have looked at, but it's not unknown for an older PSU to just throw in the towel in a new setup. As @Davit2005 suggested, you could have a faulty power switch. Try disconnecting the motherboard power jumper and shorting the contacts to power it on.

Oh, and I accept no responsibility whatsover should this go wrong!

I would also try turning off the PSU power switch and holding down the power button to drain the charge from the motherboard.

The process of elimination troubleshooting this could be very long.

[Brax]

How old is the PSU? The standoff advice would have been the starting point I would have looked at, but it's not unknown for an older PSU to just throw in the towel in a new setup. As @Davit2005 suggested, you could have a faulty power switch. Try disconnecting the motherboard power jumper and shorting the contacts to power it on.

Oh, and I accept no responsibility whatsover should this go wrong!

I would also try turning off the PSU power switch and holding down the power button to drain the charge from the motherboard.

The process of elimination troubleshooting this could be very long.

About a year old if that. I was hoping it would be a quick afternoon build but now i've got to take it all apart

[Dos_Box]

About a year old if that. I was hoping it would be a quick afternoon build but now i've got to take it all apart

 

I think we've all been there!

[Brax]

Update... I took the mobo out of the case. plugged in just the RAM, Graphics card, and CPU with cooler. Used the screwdriver trick to get the power switch to activate and sure enough it worked perfectly. I then removed two of what I suspected were the culprit standoffs causing the short and sure enough it boots. Except... When I plugged everything back in and powered it up, it started to smell quite badly and smoke did come out the back of the PC. Turned it off in time before any damage was done but the BIOS screen did come up so hopefully it's salvageable. Having said that the smell of burning/chemical wasn't coming from the PSU but the motherboard area. No visible burn marks on the front but I haven't checked the back as I Powered everything down and called it a night going to inspect the damage later. I have not had much luck with this build. It's not exactly a cheap case either.

[Brax]

I fixed it and ashamed to say it wasn't the standoffs at all. A big mistake I made with the PSU cables were the culprit. Luckily no major damage done just a burnt sata cable and damaged port on the motherboard...