Pc cutting off

jasdeep · 05-08-2008, 05:00 PM

hey fellas whts goin on i got a problem here dunno if this the right section to post it on but anyway,
all of sudden when i play my music and pump up the volume put it on 100% my pc shuts down and smoke just comes from the motherboard switch i dont know why this happens this has happend to me twice know. when it 1st happend i replcaed the motherboard becuase i thought it might be the motherbaord but know the same thing is happening to the new one. i had no problem playing the music at 100% before all i did was just adjust a few things on the amp and soundcard to make my sound better.

i dont know whats going on here i need your help guys thanks

brucedog · 05-08-2008, 10:57 PM

Let's see...

It takes power to make anything smoke electrically, so I am guessing that somehow voltage is feeding back into your mobo, probably related to audio connection. That's a "no duh" statement, but we must start somewhere in troubleshhoting.

What kind of psu are you using for your carpc?

Is the audio output of your sound card connected to one or more amplifiers?

Do you have a sound card, or are you using mobo sound output?

Disconnect your connection between carpc audio and amplifier(s) and put your dc voltmeter in series: check from carpc audio ground to amp audio ground and see if voltage is present. Check carpc left and right audio outputs (+) to amp audio inputs (+), looking for voltage present. There should be no potential between these points.

You might be getting a surge or spike in your dc power due to amplifier drawing too much. Try connecting an mp3 player to amp inputs and turn it up (NO connection to carpc at this point). Measure your 12 volts dc supply to amp(s) when volume is high, with some bassy music to see if amp is dropping dc supply excessively. Do you have large enough gage wire feeding amp?

jasdeep · 05-09-2008, 08:01 AM

i have a M2-ATX psu. i have got 2 amps one for the componets and one for the sub. i am using a soundcard

i will try those thing what you have said and see what happens. yea i have 0wiring gage.

thnks for you reply

jasdeep · 05-13-2008, 08:22 AM

i took my pc apart to see if there were any lose wires maybe thats why it was causing the pc to smoke up, as i was taking it apart i realised that my ide cable was all burned up i dont know how this happend so i replaced the cable and everything is fine at the moment (touch wood). i think this may have happend because it was overheating what do you guys think?