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System no longer starts at all
Tyrion 
7/9/08 3:36:45 AM
Apprentice
Hi Guys! You have helped me a lot in the past, I hope you can help me now.

I'm trying to fix up my Gf's old PC. The mobo is a gigabyte GA-7vt600. We have tried to replace her old FX 5200 graphics card with a less ancient Geforce 6800. On inserting the card (and shifting a whole mess of cables out of the way), we tried to power up the system, only to find that NOTHING happens when we hit the power button. No lights, no fans, nothing. Even if I put the old graphics card back I get nada. We have checked all connections - all seated well. I re-assigned a few power cables, but that was just swapping Molex sets around. I'm tearing my hair out here. Any ideas what I've done to this dinosaur? There is a tiny orange LED that is lit just below the power connector on the mobo - what does that mean? I can't find any troubleshooting info online...

I'm hoping to avoid having to replace the board, as that would basically mean replacing everything.....

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strifus 
7/9/08 9:37:08 AM
Charge
reseat everything, apart from cpu and see what happens. i dont know about the board you described but there is usually a LED light there on the board to tell you if there is power going to the board. in my experience, its either one of two problems. one, peripherals not seated properly or, and this is more likely, the PSU has borked it. id check it out with a spare PSU if you have one.

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aliali 
7/9/08 10:09:25 AM
SuperHero
Immortal


Refit old gfx card and then unplug the case from the mains socket.
Wait 10 minutes and plug it back in and try again.
It is possible the new card overloaded the PSU, at best tripping the overload protection. Unplugging it from the mains power should reset the circuit breaker. At worst the PSU has died so try another PSU if you can. Or you could disconnect the PSU totally from the mobo and try the paperclip trick to see if it will start.
http://aphnetworks.com/tutorials/psu_paperclip_trick

Oh and double check the lead is properly plugged in to the back of the PSU and that you haven't accidentally knocked the on/off rocker switch on the back of the PSU in to the off position.


Edited by aliali: 7/9/2008 10:13:52 AM

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SceptreCore 
7/9/08 1:59:51 PM
Guru

Quote by aliali
Refit old gfx card and then unplug the case from the mains socket.
Wait 10 minutes and plug it back in and try again.
It is possible the new card overloaded the PSU, at best tripping the overload protection. Unplugging it from the mains power should reset the circuit breaker. At worst the PSU has died so try another PSU if you can. Or you could disconnect the PSU totally from the mobo and try the paperclip trick to see if it will start.
http://aphnetworks.com/tutorials/psu_paperclip_trick

Oh and double check the lead is properly plugged in to the back of the PSU and that you haven't accidentally knocked the on/off rocker switch on the back of the PSU in to the off position.


Edited by aliali: 7/9/2008 10:13:52 AM


Do that, and if still no dice!!

Then I think you have fried your mainboard.

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Swordsaint 
7/9/08 3:41:15 PM
Serf
If you have the manual you can check out what the orange LED is meant to mean.
Also when you say nothing happens, does that mean even the psu doesn't start up? Afaik even if the mobo is borked all fans and stuff should still start up as power will pass through it. I'd say try another PSU if you have one.
Could also try resetting the CMOS although not sure if that would make any difference??

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sora3 
7/9/08 3:52:50 PM
Immortal

Your best bet is to look up the motherboard manual and see what does it mean to have that orange light.

Also, do what aliali suggested.

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