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Old 07-28-2009, 07:36 PM   #11 (permalink)
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Default Re: Put everything together but the system wont start :(

Originally Posted by chesirecat1701 View Post
my money is on your shorting out somewhere as said "repairman" stated.

and what he means is that some where along the line a "hot" lead (the path/wire that carries the 12v-5v input current) is touching metal in your case, why is this bad?

Because unlike a house 12v DC relies on a single path.
Ac input-> power supply-> 12v or 5v current -> (place device here) -> ground loop -> power supply

when the hot lead is touching the metal is basically the same thing as touching 2 120v AC "hot" leads together ( better known as arcing a circuit) and this can fry anything that is now touching metal, now you may not feel this when you touch you case as the PSU is active because it takes some power at 12v DC to be felt by a human.

when he said "shorting the motherboard" you probably didn't install some/all or the risers. if so you definitely need to.

Now take everything I say with a pinch of salt, I am by no means an electrician but I've dealed with enough of the simple wiring of life (both AC and DC) that I have a faint basis in electron theory.

You can troubleshoot this with a multimeter.

this is a multimeter if you didn't know.

like I said I'm no pro but it's just my $.02
Wow ! thats EXACTLY what was happening! the motherboard was touching the metal.
Anyhow the issue is resolved now. What can I do to NOT repeat this in the future?

Whats the best way to screw a motherboard inside the case? Any tutorial would be helpful.

Okay so now, I have bought and installed the Sapphire 4670 card. About to install Windows.. wanted to know if the motherboard will disable the onboard video automatically or if I'll have to do it myself.

Also, is this step AFTER installing the OS or BEfore?

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Old 07-28-2009, 07:47 PM   #12 (permalink)
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Default Re: Put everything together but the system wont start :(

You will have to disable the on board and switch to your socket manually through the BIOS. Don't think it matters if you do it after or before, your on board graphics can handle the OS installation fine. But you can do it right away so you don't forget about it later.

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