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PC not powering up

neyjunior

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Jun 4, 2007
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I've just bought and assembled a computer with Coolermaster Centurion 5 case, Enermax Noisetaker EG425P-VE-SFMA 420W, Core 2 Duo E4300 CPU, Gigabyte GA-965P-DS3 mobo, Corsair XMS2 TWIN2X2048-5400C4PT memory, Asus Radeon X1950 Pro PCI-E, 1 Seagate SATA HDD, 1 SATA DVD-RW drive.

All the connections are OK, including the CPU 12v and the 24-pin mobo connector. When I turn on the computer, the case blue LED lights up, the power supply works, case fans work, video board cooler works, but the CPU fan works intermittently.

I then connected the CPU cooler to the SYS_FAN connector of the motherboard. Now the cooler works ok, but the computer does not yet turn on. In both cases, there are no Award Bios beeps and the monitor can't find a signal.

I also tried disconnecting the dvd-rw drive, the case fans and utilizing just one memory chip.

What do you think?
Thanks a lot.
 

sswilson

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First thing that pops up is the fact that your PSU is well below the recommended min standards for a 1950pro vid card. (450W + 30A on a single rail 12V system or bare minimum 18A on a dual rail).

Can you get your hands on a vid card that's a little less power hungry to see if it's sucking the life out of your system?

On the off chance that it isn't the PSU, plug your cpu cooler back into the cpu slot and try a c-mos reset. I've noticed more and more mobos which refuse to do an initial post until after you do a c-mos reset.
 

sswilson

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You also didn't mention if you had the adapter power plug going to the vid card....
 

pscout

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as sswilson said, if you have a pci video card it would help eliminate a few things like the new card and power draw.

I have several enermax 465's ( not noisetakers) and they are all able to run an oc'ed x1900's and 930D's, but not sure about your model.

Another test is to kill all power, and remove the memory since it is one of the first items tested in post. Hopefully you get some beep codes with the memory out.

fortunately for me i haven't had any ds3 failures to troubleshoot other that crucial 800 memory that won't post. And i have seven ds3's now. I am a lot more familiar with asus mobos.
 

neyjunior

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Jun 4, 2007
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Yes, the PCI-E power cable is connected.

I'll try to find a used PCI vid card if clearing CMOS and removing memory don't work.

Thanks, guys.
 

neyjunior

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Jun 4, 2007
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Clearing CMOS didn't work. When I turn on the system without RAM, the beeps indicated a power problem.

So, I bought a used PCI card and the system booted, but the CPU cooler still didn't work well and the system locked up after 1 minute in BIOS.

I took the energy supply to a store and the guy tested it with a device. It's ok. In the end, I concluded the motherboard may be faulty. I think I'll be getting a RMA.
 

sswilson

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I took the energy supply to a store and the guy tested it with a device. It's ok.
There is probably nothing wrong with the PSU other than the fact that it's not designed to run a 1950pro. Unless he put it in a system with your video card to run the test, the test is meaningless.

You can RMA all you want, but sooner rather than later you're going to have to replace that PSU if you want to run that vid card.
 

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