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alnite

So I bought a new computer...

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alnite    3438
A while ago, http://www.gamedev.net/community/forums/topic.asp?topic_id=437155, I made a thread posting about which hardware to get. I made my decision, thanks to you guys. Now I have an Intel 2 Core Duo, and all the stuff I need. The problem is, motherboard doesn't seem to be doing anything. I put the processor in, put heatsink and fan on top, plug the fan cable to the "CPU Fan" slot on the mobo. Put one stick of RAM. No harddrive. Nothing else. Just wanted to see if it even booted. It doesn't. Even the CPU fan is not spinning. If I press the power button, I can see the CPU fan starting to spin but then it just dies away and stops. No other beeps are heard. Completely silent except the power fan. There is a green light on the motherboard, and the light is on. The power fan is also on, the only thing spinning. What else could it be? I never encountered something like this before. At least the CPU fan should start to spin, but this one doesn't. Bad mobo?

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morx    176
Something similar happened to me when I built my computer a few years ago. The solution for me was to remove a jumper from the motherboard. It may be worth a shot to look in your motherboard manual for correct jumper positions.

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alnite    3438
You know what..I think this mobo doesn't support Intel Core 2 Duo. It is LGA775 slot, the same as Pentium 4, but it doesn't say on the manufacturer's website that it supports Intel Core 2 Duo. It doesn't say it doesn't support it either. It just says that it support Pentium 4.

Is it a possiblity?

edit:
Actually, no. That can't be. Could it be a bad processor? Since the fan did receive some power for a second, then mobo detects a bad processor then just stop the power completely...?

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nullsquared    126
Did you (properly) plug in the 24-pin ATX power connected as well as the 4-pin CPU power connector (also possibly 8-pin, not 4)? Did you use thermal paste (or the thermal pad that is pre-applied)?

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alnite    3438
Yes. Everything is connected properly. This is a barebone system. Everything has already connected to it. The manual doesn't go indepth in how to connect these cables, because they are already connected. It doesn't say anything about a specific jumper that I should switch either.

This is the mobo:
http://www.newegg.com/Product/Product.asp?Item=N82E16856110068


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alnite    3438
Quote:
Original post by teh_programerer
PSU, maybe? I had a problem with my PC where all the fans would come on for a split second and power off, I looked at the wires on the PSU and they had burned out.

That could also be a possibility. I am going to ask Newegg to exchange this. I am not sure which ones are broken, mobo, psu, fan, or processor..

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Muse    254
So this is a bare-bones system purchased from newegg? If so I'd give 98% odds that all the components are fine. Have you tried reseating that stick of RAM? It should be really, firmly snapped down on both ends with the tabs all the way in lock position. If it's not the PC won't even power on, just as you described. I'd double-check that and also double-check your mobo manual that the type of memory you purchased is compatible.

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azound    124
I sounds like your motherboard might be short-circuiting. This can happen if your mother board is touching your case through a metal connection (ie the screws).

Your motherboard should have come with special screws which don't conduct electricity called "Mounting screws" - make sure you're using these screws to connect your motherboard to your case.

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hplus0603    11356
Maybe you have a fork in your computer? :-)

Jokes aside, that's not entirely unheard-of. Modern motherboards have all kinds of safety features and self-test doo-dads. It may be that the mobo comes on, the BIOS looks for <feature X> and sees X is not there, so it turns off any further power.

Have you hooked up the power LED and the power button? Is the polarity right? A power LED with the wrong polarity has onced cause the symptoms you describe for me (as far as I could tell).

Are you sure the CPU fan is hooked up to the right CPU fan connector? A mobo that doesn't sense a CPU fan won't boot.

Do you have a graphics card in? Many BIOS-es will freeze up if they can't actually display their power-on graphics.

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knowyourrole    254
Some new motherboards only support core 2 duo with a certain BIOS version. Chances are your motherboard does support it, but you recieved a one with an older BIOS version.

If it doesn't say it supports it however, then it probably doesn't, they are usually quite specific in saying whether they do or not, and probably wouldn't generalise it as being a pentium 4.

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alnite    3438
No, I assure you there is no fork inside :D

I tried removing two screws nearby the RAM slots. It was still happening. Fan not spinning.

I tried one other thing. I removed the processor and the RAM. This time, just the fan is plugged in. Turn on the mobo, the fan stays idle for 2 seconds, then it starts spinning (I was like "w00t!"). OK, so the mobo does receive some power. Then I put the processor in (RAM is still out), and put on the fan. Doesn't spin...

Yeah, it could be a BIOS thing (but I don't have an extra P4 to test it), or it could also be a bad processor.

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Hodgman    51328
What is the wattage of your power supply?

I had a problem like this once. I had a 350w PSU, and it would turn on for 1 sec and turn off again. I replaced it with a 400w PSU and everything worked fine.
These new CPU's use a lot of power ;)

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alnite    3438
The PSU is 275W. I would assume it'd be enough because it says that it supports the Intel Core 2 Duo.

edit:
I figured the problem out. It does support Intel Core 2 Duo, but it doesn't support Intel Core 2 Duo 4300! !@#@!%

[Edited by - alnite on March 4, 2007 10:14:15 PM]

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Hodgman    51328
Quote:
Original post by alnite
The PSU is 275W.

Whoa. Thats pretty low wattage, especially if you're considering putting a 3D card in there too ;)

If you're gonna use this as a gaming machine (i.e. it's gonna have lots of powerful hardware or multiple hard-drives) I'd consider getting a 450w or 500w PSU just to make sure it's "future proof" (for example, when I added an extra HDD to my computer with the 400w PSU, it stopped working until I unplugged a few of my extra fans. Now I need a 450w to power everything.)

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daviangel    604
Quote:
Original post by Hodgman
Quote:
Original post by alnite
The PSU is 275W.

Whoa. Thats pretty low wattage, especially if you're considering putting a 3D card in there too ;)

If you're gonna use this as a gaming machine (i.e. it's gonna have lots of powerful hardware or multiple hard-drives) I'd consider getting a 450w or 500w PSU just to make sure it's "future proof" (for example, when I added an extra HDD to my computer with the 400w PSU, it stopped working until I unplugged a few of my extra fans. Now I need a 450w to power everything.)

Unless he plans on sticking a highend vidcad like a 8800 or 1900 ati he should be fine since I'm running all the following with only 350W but it is a quality psu.
running/testing Vista Ultimate x64
ATI radeon 1300 vidcard
AMD athlon X2 3800
EVGA AMD sli board bundled with cpu NF41
36GB old raptor drive
misc old Maxtor/WD IDE harddrives
SB Audigy soundcard
2GB kingston hyperx ram
plextor 755sa sata dvd burner
Antec 350 smartpower PS in antec black case

As far as the cpu/motherboard not booting if it a pre intel core2 release motherboard you might have to send the board back if it doen't already have a core2 compatible bios in it since the only way to flash it would be to boot with a celeron/P4 first which alot of the first people to buy core2 motherboards had to do and some people even bought a cheap celeron just to flash the bios which is stupid to me.
It should give off some beep though so you could look up the bios beep codes to be sure.

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nullsquared    126
It's not just the wattage people. It's also the brand, the amps, and the overall quality. A Fortron Source (FSP Group) 400W (that I have in an old eMachines, 230$ upgrade made it run like a 100% quality beast) will be better than some no-name 600 watter. Besides, it won't really deliver 600W. Trust me.

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Hodgman    51328
Quote:
Original post by agi_shi
It's not just the wattage people. It's also the brand, the amps, and the overall quality. A Fortron Source (FSP Group) 400W (that I have in an old eMachines, 230$ upgrade made it run like a 100% quality beast) will be better than some no-name 600 watter. Besides, it won't really deliver 600W. Trust me.


Speaking of such, you got me wondering if a PSU of the same power would have different wattages in different countries? In Australia we have 240v power, but the US is 110v or something, right? Assuming both countries have the same input amps, would you need more/less watts to run the same computer in a different country?

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daviangel    604
edit:
I figured the problem out. It does support Intel Core 2 Duo, but it doesn't support Intel Core 2 Duo 4300! !@#@!%

This should be a warning to all newbies that don't have experience building systems and should be a sticky in hardware forum.
If you spend any amount of time reading the newegg reviews you'll find quite a bit of people getting burned not being able to bootup brandnew cpu due to fact that there is noway of knowing what version bios the motherboard you are buying has and if it supports specific cpu!
People that upgrade alot like myself don't really have a problem since I have a spare P4,etc laying around I can use to flash the motherboard bios to support newer cpu.

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