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Asus Sabertooth 990fx wont power up

post #1 of 33
Thread Starter 
Hey everyone,

I've been lurking here for a while, and I hate to make this my first damn post but I'm at a loss here.

I've just installed my new board but it won't power up. When I press the power button I get a quick dash of power and a beep which sounds like it's coming from the processor area, then nothing. The green power light on the board is lit up. I can actually see everything getting power for a split second as the little red LED on my Cooler Master V8 flashes on for a split second. I've disconnected and reconnected all wires and have removed and reseated every component. I've tried a bare bones boot with processor, graphics card and 1 stick of RAM yet I still have the same issue. Everything is the same in my system specs except the MOBO. I had to return that MSI garbage.

I feel like an idiot right now, but out of the 10 or so builds I've done in my lifetime, I've not run into this issue before.

I'd appreciate any and all suggestions!
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post #2 of 33
Ok, well you have tried resetting the bios? If so then take the 8pin power connectors out and try powering up the board. If it boots then VRM failure....Maybe a bit of static or just a bad board...who knows. Is it new out of the box and anti-static wrap?

Edit: it obviously won't boot, stuff will just turn on, in that case just get another ASUS sabertooth, it would be a very rare find with VRM failure with that.

Also see if the power supply is good, it may not be a mobo problem at all.
Edited by caleb - 7/29/11 at 10:42am
post #3 of 33
When you say "barebones" build, did you do this outside of the case? Sounds like something is shorting out the board.

Take out the motherboard, place it on a anti-static surface and hook everything up to it outside the case - if it boots up no problem then there is something in the case shorting it out. Make sure all motherboard standoffs are being used, have a screw, and are tight. Insure there is nothing behind the motherboard that could be shorting it out, loose screw for example. Shake case!
post #4 of 33
Thread Starter 
In the process of doing that right now. I did not initially bench test the board. However I know for certain that there is no loose debris in the case that would be shorting it out.

I'll be back after I find out what happens here biggrin.gif
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post #5 of 33
Thread Starter 
Well, she booted up.

So this is going to get interesting. I know for certain that all standoffs are in the correct spot, there is NO lose items in the case making contact with the board either. All screws into the mobo were secure and tight.

I guess I'm going to very veeeery carefully screw the board back in the case. The only thing I can think of is perhaps one of the screws was touching the MOBO through the screw hole (not directly centered).
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post #6 of 33
Sounds like it. I was going to say if this was an RMA it would be the first sabertooth I have seen on here. Haha keep us posted.
post #7 of 33
Thread Starter 
back in the case, back to shorting out. mad.gifwth.gif

I noticed when i took the screws out of the board, some of the little silver dots that surround the screw hole were not there. Do you think this would be the cause of my issues? I've always been very careful as to how tight I tighten the screws on the board. I find it rather crazy that I could have rubbed those off.

Are there any non-metalic screws I could use, perhaps? I can't possibly see anything else that's giving me a short in this case, besides those.

edit: Caleb, I apologize I totally missed your first post there.. Yes the board is brand new out of the box. I did try resetting the bios, but I have not tried booting w/o the 8 pin connector. My power supply is good, I just had it tested before I decided it was time for a system upgrade. smile.gif
Edited by blampars - 7/29/11 at 11:46am
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post #8 of 33
I guess you could use plastic screws if you could find them..... is there a way you could maybe getto rig some static plastic around the screw...just a suggestion...If so and it works it needs to go in the "other" part of your sig rig.
post #9 of 33
Thread Starter 
Quote:
Originally Posted by caleb;14393714 
I guess you could use plastic screws if you could find them..... is there a way you could maybe getto rig some static plastic around the screw...just a suggestion...If so and it works it needs to go in the "other" part of your sig rig.

I'm currently looking on microcenter's website (best cpu store i've got here in MI) for either some plastic screws, some very small plastic/anti-static washers, or some type of barrier like the static plastic you mentioned.

By ghetto rig the static plastic, do you mean using some of the anti-static bag and making little washers out of it?
I was thinking more along the lines of finding some of that material you find on the back of a cpu cooling bracket (for the back of your board) so the metal doesn't touch it...
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post #10 of 33
Quote:
Originally Posted by blampars;14393763 
I'm currently looking on microcenter's website (best cpu store i've got here in MI) for either some plastic screws, some very small plastic/anti-static washers, or some type of barrier like the static plastic you mentioned.

By ghetto rig the static plastic, do you mean using some of the anti-static bag and making little washers out of it?
I was thinking more along the lines of finding some of that material you find on the back of a cpu cooling bracket (for the back of your board) so the metal doesn't touch it...

Be careful if you're going to do anything with the anti static bag. The outside of the bag IS NOT anti static, only the inside.
     
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