Question about ASUS M3A78 Pro AMD 780G AM2+/AM2 Phenom FX/Phenom/Athlon /Sempron Socket AM2/AM2+ 5200 MHz PC2-8500 ... Motherboard

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Newly build computer problems

Just build this computer and after powering on:
No video, all lights and fans work. no POST. cd rom light stays on and opens, but does not close. hard drive spins. switch out hard (sata) with ide same problem.
Asus m3a78-t motherboard
AMD phenom 940 processor
ATi Radeon 4850 512 mb video
4gb corsair dominator memory 800
sony 16x dvd rom sata
300 gb WD sata hard drive Not sure what I did. Only my 2nd time building one, first one was perfect. thanks for all your help.

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You might not have your BIOS set to display through PCI-E. Try plugging your monitor in through the onboard VGA or DVI port and see if that produces any results. If you see the POST loading up, go into your BIOS and set your display through PCI-E.

If you're plugging into the onboard ports already, try plugging directly into your video card.

If both won't display anything, I'd try switching out the monitor.

Posted on Mar 25, 2009

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I bet your power supply isnt powerful enuf for your video card.

Posted on Mar 11, 2009

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Posted on Jan 02, 2017

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Same problem for me.CD-Rom doesn't work either


There could be a number of problems such as:

Your PSU is toasted. (Power supply unit)
Your Motherboard is fried.
Your Ram is fried.
Your power button is loose from the contacts (or the wire is loose).
Your Motherboard, Your Drives, and/or Devices are unplugged in one way or another.
And/or more

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Dell inspiron 1150 won't turn on


Remove the battery the memory the ac adapter,the hard drive, the cd rom.Press and hold the power button down for twenty seconds.try again if no go you will have to replace the systemboard.
Good luck

Jan 13, 2009 | Dell Inspiron 1150 Latitude D600 14.1 LCD...

2 Answers

No video


Go to the Asus website and download the drivers for this board. It's most likely that it did not come with drivers installed. Hopefully this will fix the problem. Good luck.

Dec 23, 2008 | ASUS P4V8X-MX Motherboard

2 Answers

No post, only motherboard light on, green.


Hey there aj1253, It seems you are getting power to the board. are the fans running?Are you using onboard video or video card. Onboard is suggested for test. I would also suggest you reseat your ram. That is removing it and ensuring it seats properly. Beyond that I would ask you provide more info ( ie is this a new build, or did it just stop working, configuration details, model #'s, et....)

Feb 01, 2008 | Dell Dimension 2400 PC Desktop

1 Answer

No post beep, no video


had a similar problem with a box i built. Your power supply has two connectors. One long one and a 4 pin connector. Make sure that four pin connector is connected.

Oct 25, 2007 | EliteGroup (ECS 915PL-A2) Motherboard

1 Answer

Compaq Presario 4400us


Either the new power supply you purchased is not functioning correctly. But, assuming it is now that you are getting some form of power to your PC, it is very likely the motherboard. Whatever fried your old power supply (or it could have just been the power supply itself) most likely fried your motherboard in the process. Probably not the CPU since the MB can't even post.

Jun 21, 2007 | Compaq (388746-001)...

1 Answer

Not posting


Maybe a silly question to ask; but did you connect the processor power lead, as unlike some processors this needs a seperate supply.

Dec 18, 2006 | Mach Speed MK8-939A (VIPERMK8939A)...

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