New Build_Wont power up

[wesacosa]

Hi All

I have just built a new PC (AMD 64, Biostar NF325-A7 board, DDR400 2x512,500w power supply, new ATX case).

When I power up the case fans and CPU fans spin for about 1 second, and then everything shuts down. Any suggestions of where to look for the fault?

Thanks
Wesacosa

[ktkendall]

A common fault for newbuild doing what yours is doing is a faulty processor heat sink fan installation. Check it to be sure it is connected properly and seated/aligned properly. Other common things are memory not fully snapped in. Do you get any beeps??

[wesacosa]

Not sure. Only did it the once as I didnt want to fry anything and I have put the power supply back into my old PC now so I can access this board!!

I will check all the connections and try again.

[ladedati]

Before you get to worried this happened to me last week when I put my new comp together. All that happened was I hurried to much and matched all my case wires to the colors of the mother board conectors. Doh. After I swore a few times I looked and my power switch, reset, and HDD conectors were on the wrong pins. Put them how they should and it started right up.

[ktkendall]

Yes but he is getting the fans to start spinning, so the power pins are correctly hooked to the right wire, but It usually is something simple with new builds, like heatsink fan not properly aligned, something on the backside of the motherboard shorting to the case if motherboard is not in right with all the standoffs properly installed, or memory not snapped in fully..

[blue60007]

Try this. You are trying to see if the motherboard is shorting out with the case.

What brand is that power supply?

[wesacosa]

PSU is Q-tec 550W. An emergency buy a few months ago when the PSU in my old computer blew up but it ran ok in my old machine for last few months.

I must say I wasnt happy with the way the motherboard went into the case (iCute ATX case). I put it on the standoffs supplied but it doesnt seem to quite line up with the holes for the back panel and the slots for the AGP/PCI items. Seems a little bit too high.

[wesacosa]

Tried all suggestions, still no joy so the board and CPU are on their way back to retailer

thanks for all the suggestions

[wesacosa]

I have just heard back from the retailer and both CPU and board have come back "no fault found" and are being sent back to me. I have had the RAM tested in a friends machine and it works. my Q-tec 550W power supply (2 months old, which the retailer seems to think is the only thing left which could be causing the problem) is working OK on my (very) old PC (only uses the 20pin connector) and both terminals of the 4 pin CPU power connector are giving 12volts so I am lost as to what could be causing the problem. I dont have a spare PSU so if there any way I can check if the PSU is the problem when my board and chip arrive back next week?

To reacap, when I power up, the cooler fan runs for about 1 second and then everything shuts down. I have tried the board with CPU, cooler and 1 stick of ram outside the case and it still does the same.

[forizzle111]

how are you powering up? becus that reminds me of when u plug in ur PC everything gets power for a sec(fans,LEDs) then goes off until u actually hit the power button.so try hittin the power button again, i mean it sounds dumb but its kinda like making sure there is gas in the lawn mower

[wesacosa]

I have tried both the case switch (which works on my old pc) and jumping across the terminals with a screwdriver. Both have same effect. There are no switches on the PSU

[Panama Red]

If I'm reading you correctly, you're using a 20 pin connector psu on a board with a 24 pin requirement. Even with an adapter, this has proven to cause many problems. We seem to get quite a few folks that have tried this and end up buying a true 24 pin unit to solve their problem.

edit: Scratch that idea. I just check the specs on that mobo and it's a 20pin unit. Shoulda looked first.

edit: When you returned the mobo/cpu combo, was the cpu still installed? And did you receive it back installed? What memory are you using?

[BrokenKingdom]

Hmm so everything is in working order as far as your Mobo ram ect.. not being damaged and everything is hooked up correctly to your Mobo and your Psu is obviously in working order seeing as though you said you are using it for the comp you are on and the mobo is not being shorting to the case. The only possable solution I can think of is check, double check, and quadruple check your connections on your MoBo. Then make 1000% sure that everything is seated correctly ie: ram, heatsink ect. and try again.

If there is not fault with the equiptment then there is either a fault with compatability or a fault with the instalation. I doubt that it's a fault with compatability. So like i suggested check double check and check again to make sure everythings seated right and te everything is lpugged in properly..

[nicolaus corelius]

ram working in one place and not working in another has been reported. so thats a possibility

[Im a winner115]

He might just have a defective mobo

[wesacosa]

I will try to answer the question in the last few replys in one post

- Retailer has tested board and chip, and said it works fine
- I havent got the chip and board back yet, but when I do I will try with RAM and see if it gets further than the 1 second of fan running
- I checked the installation so pretty sure everything was ok with that. The PSU is working fine with my old spec PC, but that only uses the 20 pin atx connector and doesnt need the extra 4 pin terminal situated next to the CPU (12v, suppy) which the new board does. (this is 2 seperate connections to the board, not using a 20pin to 24 pin converter). The guy i spoke to from the retailer who tested my CPU and board is convinced it is the PSU (although I tested that the terminals were live with a multimeter, he thinks it could be supplying an unsteady current which is putting the CPU into some kind of safety shutdown)

- CPU was not attached when board was sent back to retailer, and it hasnt arrived back yet for me to check if it attached when it comes back
- I am using 2x512 DDR400 PC3200 corsair RAM

Thanks
Wesacosa

[wesacosa]

I am really at my wits end with this now. I have had the mobo and CPU returned from the retailer saying teseted, no fault found. Suspect my PSU.

I connected board CPU cooler to PSU (outside case) and it still turned off after 1 second. So I took the PSU (Q-Tec 550W) back to where I bought it. They have just tested it and guess what, no fault found!! So now I am completly out of ideas.

Anyone ever heard of PSU's not been compatable with mobo's even though they are the correct connections and have a decent power rating. Clutching at straws maybe but unless I am missing something VERY obvious or one of the retailers is lying to me then I really dont know what it could be.

Thanks
Wesacosa

[nosefirst]

"I must say I wasnt happy with the way the motherboard went into the case (iCute ATX case). I put it on the standoffs supplied but it doesnt seem to quite line up with the holes for the back panel and the slots for the AGP/PCI items. Seems a little bit too high"


I'd be looking here again!

[wesacosa]

Managed to sort that in the end. Besides the board will not run in my old case or with the board out of the case all together

[ShockValue]

you arent mounting the mobo right ot the case are you?

[wesacosa]

Sorted!!!

After all this time it was the one thing I was sure it wasnt. A faulty PSU.

Trip back the retailer and all is well!

Thanks all for the help

Wesacosa