Can you give me more troubleshooting ideas?

Asus M4a89td pro/usb3 desktop motherboar...
February 13, 2011 at 07:58:26
Specs: Windows 7, AMD Phenom II 3.4GHz
I have an Asus M4A89TD Pro/USB3 Motherboard that I'm using to build a new PC. After I finished assembling the tower I turned it on and began setting my BIOS. I only set the date and time when my whole tower powered down. Since then I have not been able to get the tower to power up. I turned the power supply off and took out each component one at a time trying to isolate what might be causing the issue. Finally I only had my power supply, motherboard, and CPU left in the tower and I was still getting the same result everytime I pushed the power button. All my LED's just blink on and immediately back off and all my fans spin maybe one revolution before everything powers off.

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February 13, 2011 at 08:10:11
Looks like you broke the cardinal rule to building - ALWAYS benchtest your hardware BEFORE you install it in a case!

How to bench test your system

It would help to list your system specs but if I had to guess, I'd say you're either using an inadequate power supply or you installed the CPU heatsink/fan incorrectly.

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February 13, 2011 at 08:22:09
The cpu fan must spin and it must be connected to the proper CPU fan header, otherwise the mboard will shut off within a few seconds when no rpm is detected from the CPU fan.

Try re-seating the ram, with the AC power to the case disconnected or switched off.

If those are fine.....

It sounds like your power supply is failing.

If you have another working computer you can borrow the PS from, or if you can borrow one from someone else, if it has enough capacity, try connecting that

If you're using an el-cheapo power supply, they're a lot more likely to malfunction and fail.

What is the make, model, and (ouput) wattage capacity of the power supply ?

If you have a video card installed in a mboard slot, which one is it?

If the power supply has a lot less capacity than your system needs, it may work fine at first, but it will be damaged by it being constantly overloaded, sooner or later !

Your power supply must have at least the minimum capacity required to support a system with the graphics card you are using installed, or the max graphics card you might install in the future.
(Onboard video - video built into the mboard - IS NOT A CARD ! )
If that info is not in the ad for the video card, you can go to the video card maker's web site and look up the specs for the model - often under system requirements - the minimum PS wattage, and, more important, the minimum amperage the PS must supply at 12v is stated. If you don't find that, any card with the same video chipset including any letters after the model number has very similar minimum PS requirements. Some power supplies have two or more +12v ratings - in that case, add those ratings to determine the total +12v current capacity.

If you're a gamer...
In most if not all cases, the max capacity rating of the PS is an intermittent rating. It's recommended that you do not load your PS to any more that 80% of that rating if you are going to be using something that puts a constant load on it, such as playing a recent game for hours on end. In that case, you multiply the min capacity stated for the system with the particular video chipset on the card by 1.25 to find the min. capacity of the PS you should get.

If you need to get a PS with more capacity, you can usually replace it with any decent quality standard sized standard ATX PS.

Standard (PS/2) power supply size - 86mm high, 150mm wide, 140mm deep, or 3 3/8" h x 5 7/8" w x 5 1/2" d , or very close to that, though the depth can be more or less for some PSs.

Don't buy an el-cheapo (in quality) PS.
See response 3 in this:

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February 13, 2011 at 08:52:24
The CPU fan spins when I try powering it up. I've tried re-seating the CPU and cleaning off the thermal paste of the heat sinc and replaced it with Arctic paste. I've tried powering up with no RAM and I've tried moving the RAM to different slots. My ps is a Thermaltake Toughpower XT TPX-775m, and for what I'm trying to power 775W should be well more than enough.

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February 13, 2011 at 09:14:23
"replaced it with Arctic paste"

Just a tiny dab in the center of the CPU? All AMD CPUs use the "middle dot" method:

"for what I'm trying to power 775W should be well more than enough"

Actually, it's amperage that's important. Regardless, you have a decent power supply - overpriced, but decent:

Did you manually configure the BIOS settings or just accept the defaults? If you have over-volted "gaming RAM", it's important to manually imput the voltage setting.

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February 13, 2011 at 09:27:44
I tried manually setting the BIOS but only got as far as the date and time before it shutdown. I only used a dot of Arctic Silver when I replaced the factory thermal paste, wasn't sure how to describe that.

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February 13, 2011 at 11:55:42
Defective power supplies are common.

If you have another working computer you can borrow the PS from, or if you can borrow one from someone else, if it has enough capacity, try connecting that

If the problem were the cpu was overheating, the mboard's bios would shut down the mboard when the cpu got hot beyond a certain temp, and when you try to boot after that, the mboard would not start up at all, or it would but it would shut off again in a very short time, until the cpu has cooled to below some temp.

When you install the heat sink on the cpu when the mboard is installed in the case, it's usually impossible to tell if it's actually sitting flat on the cpu like it's supposed to be. If it isn't sitting flat on the cpu, the cpu will overheat regardless of whether you have installed thermal whatever between the heat sink and the cpu properly. Typically the computer will work fine after it has been started up after having a chance to cool to room temp, then eventually the cpu will overheat and the bios shut down the mboard.

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