Computer won't turn on after installing new graphics card

Ber Paz

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Feb 24, 2014
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I upgraded my old graphics card which was a bad one. After putting in graphics card my computer won't turn on with or without the graphics card. When i try turn it on, nothing happens, almost as if i was trying to turn it on without the power supply plugged in. The graphics i upgraded to was an EVGA Geforce gtx 750 SC.
 

Gee Bee

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Jan 16, 2014
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well it was working prior to fitting the 2nd new card, so perhaps you have accidentally dislodged the power connector from the front panel connector header on motherboard. Or possible even the main atx power connector. I've done this several times throughout the years. Check it out
 

Gee Bee

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Jan 16, 2014
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ok, have you reset cmos. If not do so with PSU NOT connected to mains or switched on. If you don't a clear cmos jumper, remove cmos battery for several minutes and then re-insert battery.
 

Ber Paz

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Feb 24, 2014
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I just saw a green LED that i hadnt seen before
 

Gee Bee

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The clear cmos jumper or cmos battery? If it's the jumper short the two pins for a few seconds, if the battery remove it for a bit longer with the PSU disconnected from mains.
 

Ber Paz

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Feb 24, 2014
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I know where both are, i disconnected the battery from the motherboard and has been disconnected for a couple minutes
 

Gee Bee

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It;s gotta be PSU or mobo fault. I'm picking PSU because absolutely nothing happens when switched on. A very outside possibility is the power on switch( i've only ever seen this once). You try this as a very last attempt before looking at finding a psu. You should be able to trace this to the front panel header for switch, reset, power\hd led etc.. It is will have something like pwrsw next to it.

http://www.computerhope.com/jargon/s/systempanel.jpg

Try shorting the pwr and ground pin which has the same effect as the mechanical switch on case.

Thats about all i can suggest as of now.