new build need help plz

[Tweek]

I just got all my new parts and built my Pc and now i can't get it to power up. I got a case with 480w PSU(which should be more than enough power), A new 2.26 ghz Celeron D CPU with heatsink and fan, a matsonic MS9337C MOBO, and a Nvidia GeForce 4 with 8x AGP. I've checked the PSU and it's good, i've checked the front panel connector 3 times and it's properly connected. The PSU has the standard 20 pin connector along with two separate 4 pin connectors and i've tried both of them and it doesn't make any difference because i'm still not getting power. Could I have a bad mobo?

[doctorgonzo]

Have you followed the steps in this thread? What brand is the PSU?

[Tweek]

the psu is a logisys. where it says to short the power switch connector what exactly does that mean? touch both pins with the screwdriver at the same time?

[blue60007]

Originally Posted by Tweek the psu is a logisys. where it says to short the power switch connector what exactly does that mean? touch both pins with the screwdriver at the same time?

Yeah, touch the pins where you would plug in the switch plug.

[jayb1234]

Does that board suppoort using a Celeron D?

I looked at the Matsonic site and couldn't confirm that it does.

[Tweek]

i couldn't confirm that either but isn't the celeron d the same thing as a pentium 4 with half the cache disabled?

[Tweek]

I followed the steps outlined in the thread that gonzo sent me and the fan kicked kicked on momentarily and the led on the mobo flashed. however when I put everything back in the case and tried to turn it on I got absolutely nothing. Is there anything else I can try?

[doctorgonzo]

It didn't stay powered on outside of the case? How long did you let it remain on?

[Tweek]

Originally Posted by jayb1234 Does that board suppoort using a Celeron D? I looked at the Matsonic site and couldn't confirm that it does.

It didn't stay powered on outside of the case. I couldn't get it to short again untill I removed power from the PSU and reattached it. Afterwards it powered on outside the case again but only for a moment. If the CPU and MOBO were incompatible would it even power on at all?

[Cricket]

Sounds like you either have a bad power supply or a bad motherboard.

Do you have another compatible power supply you can test with?

Cricket

[Tweek]

Originally Posted by Cricket Sounds like you either have a bad power supply or a bad motherboard. Do you have another compatible power supply you can test with? Cricket

Already tried it with a power supply I know works, still got nothin.

[doubledragon5]

The only one listed on the manufactures site is the MS9337C+.. Which according to the description it does not support the celeron CPU... It call for a Intel P4 1.5~3.2 GHZ or faster...

http://www.matsonic.com/mb/productsdata/ms9377c%2B.htm

[Tweek]

I sent off to have my mobo refunded. Thx dragon now I know what I need

[Tweek]

I just got a compatible motherboard for my build but now i can't get it to stay power on. I plugged it in, the LEDs flashed and it powered up for a sec. then i hit the power button and got nothing. The motherboard is a Biostar P4M800-M4

[glc]

You are still buying substandard boards. Matsonic is garbage, Biostar isnt bad but that one has a Via chipset.

The new one does the same thing out of the case on the table? It should start and KEEP running before you put it back in the case.

[Tweek]

Yes it wont stay powered up in or out of the case. What should I buy then? Is there any way I can get this mobo to work properly?

[Cricket]

Did you try using a screwdriver to jump the two PWR pins to start the computer up?

Are you sure you've identified the correct pins for the power button?

Cricket

[Tweek]

Tried jumping the pins, no response. According to what's printed in the book and on the mobo, they're the correct pins.

Originally Posted by glc You are still buying substandard boards. Matsonic is garbage, Biostar isnt bad but that one has a Via chipset. The new one does the same thing out of the case on the table? It should start and KEEP running before you put it back in the case.

If you have any suggestions on a quality mobo, or if a new higher quality mobo would help my situation, i'm all ears.

[Cricket]

Originally Posted by Tweek If you have any suggestions on a quality mobo, or if a new higher quality mobo would help my situation, i'm all ears.

ASUS P4P800SE.

Cricket

[glc]

The motherboard may not be THE problem. The Biostar is decent enough quality where it should at least work out of the box, but there is always the possibility it's DOA.

Common gotchas:

1. CPU not oriented correctly in the socket and/or not locked down fully.
2. Heatsink not correctly installed and locked down tight.
3. Defective ram, or not installed correctly. DDR ram has a slightly offset key, but it IS possible to put it partially into the slot backwards. It has to snap fully down into the slot till both locking ears close fully.
4. Defective video card. That board has onboard video, try that instead.
5. Failure to connect the 4 pin auxiliary power connector by the CPU.
6. Failure to connect the CPU fan power lead to the correct motherboard connector, or connecting it backwards.

The reason for doing this on the table is this - with nothing but CPU, ram, power supply, and video, you rule out any other bad component, and rule out internal shorting to the case.

[stevebro6510]

it could be your ram...

[glc]

steve, refer to my previous post, item 3.

[stevebro6510]

i see. i just wanted to point out that tweek should check his ram before he starts buying new components

[Tweek]

Thanks glc, i checked everything and found a problem. My CPU heatsink won't sit correctly for some reason. And when i tried to plug it in again the psu suddenly shorted out. Looks like i need one of those now. I'm just going to order a higher quality mobo anyway. :/

[Tweek]

I got all my new parts in today, an ASUS P4P800 SE, Raidmax 450w PSU, dvd burner and a new 250 gig HD. After I put it all together I still had the same problem of it not turning on but when I flipped the switch on the PSU, the LEDs flashed and it made a high pitched sound. I took everything out shorted the jumpers as outlined in the thread and it actually started up (a joyous sight). However when i put it all back in the case it wouldn't turn on. I checked the front panel connector to make sure it was hooked up properly and it is. What else could be preventing in from starting up in the case?

[glc]

Why did you buy a Raidmax PSU? You gotta stay away from those cheap brands.

Make sure you don't have standoffs in the case where there are no screw holes in the motherboard. You *are* using standoffs where required, right?

[Tweek]

..... standoffs? Umm, enlighten me please. (this can't be good)

[jayb1234]

Standoffs look something like this. You need one under each of the motherboard mounting holes, and only under the holes. Without standoffs your motherboard will short to the case.

[glc]

If you are trying to screw the motherboard directly down to the tray without standoffs or builtin raised pads, this is a problem. Cases come with standoffs premounted, or in the parts bag, or the tray has raised pads. Nothing should contact the bottom of the motherboard except under a screw hole.

[Tweek]

Thanks jayb, i got a bag of those with another mobo i ordered previously and I couldn't figure out what they were