Loud pop when turning on my newly built system!

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Andrew Novinka

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Aug 11, 2013
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So i just built my first system, and everything seemed to be in the right locations so i booted it up. There was a loud pop and i could smell a little smoke. i turned everything off then decided to try again. everything boots up fine and all the fans work and the mobo led "boot_device" stays lit, but i cant get any video? I was wondering if the loud pop may have fried something or if i've just messed up somewhere? my components are:

asus z87-plus
i5-4670K
evga gtx 770
corsair vengence 8gb (2x4g)
thermaltake 850w psu
 
Solution
O
Loud pop. Sounds like an electrolytic capacitor bit the dust. Possibly due to a short or over voltage.
Can you see any black/leaking capacitors on the board?

You may just have had a bad cap.
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onichikun

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Nov 13, 2009
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Loud pop. Sounds like an electrolytic capacitor bit the dust. Possibly due to a short or over voltage.
Can you see any black/leaking capacitors on the board?

You may just have had a bad cap.
 
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Solution
babernet_1

babernet_1

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May 8, 2012
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+1 Thermaltake's are not the best of Power Supplies.
 
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USAFRet

USAFRet

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All that means is that the fan is getting voltage. Says nothing about the condition of rest of the PSU.

Something in there got cooked.
Your mission, should you decide to accept it, is to find out what that was.
 
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onichikun

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Nov 13, 2009
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Unfortunately it isn't that easy as checking if each part is getting power. There are many capacitors for different reasons. So checking your power supply is one possibility.

The capacitor may also be on your board or graphics card, etc. Check for a black residue or leaking. There are a lot of caps on GPUs to handle load variances, it may have been one of the power caps.

If your mobo has a graphics out, try removing your GPU and see if you get video.
 
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onichikun

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Nov 13, 2009
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If it was from your PSU, then it is probably dead.

It may have been a capacitor for one of the 12V/5V rails for the 24-PIN ATX connector... So your motherboard or even yoru GPU may not be getting sufficient power.

If you had a volt meter you can check your voltages, if not, I would say RMA your PSU immediately. I have had a lot of PSUs dead on arrival.

Actually one of the scariest ones I had was a PSU from Enermax.. A ball of fire shot out the back of it when I turned it on, like a mini jet-engine.

I don't think I ever ran away and unplugged anything faster in my life.

This is why I test all my PSUs on arrival without installing them by shorting the green wire on the 24-pin atx header to any ground (black wire).

Also, be careful to make sure no motherboard traces/pin or devices are touching your chassis. Although a good PSU would turn off if too much current is drawn, your PSU may not be "good" and have just blown due to a short somewhere..
 
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