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Old 05-07-2005, 07:57 PM   #1
Guru Imakuni
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Default Need some computer building help.

I'm trying to build my my mom a new computer for Mother's Day. I put everything in (mobo, hard drive, cd drive, ram) and plug it in. When I turn it on...nothing. The fan will jolt a little bit so it's get power for a fraction of a second. Then nothing. It seems like a short and I've put plastic under the mobo so the only connection between the mobo and the metal case is the screws.

Could placing the power, LEd, hdd LED connectors on improperly cause this? I don't havethe original manual and I can't figure out what ACPI one is for.


Could it be anything else that's causing this other than a short somewhere else in the system?
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Old 05-07-2005, 08:04 PM   #2
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Assuming the components are good, and the PS is hooked up right....I'd get on the web and get the manual for the motherboard and figure out where the connectors go. Flipping those can make it fail to power up.

good luck.
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Old 05-07-2005, 08:09 PM   #3
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I was thinking it could be the PSU but I doubt it. I've never had one go on me so I don't know why this one would just do it when I've used the computer before. Last time I used it I transfered cases and left it alone for awhile.

I found the manual online but the document is all screwed up. I'm opening it up in MS Worse and all these little boxes were jumbled together. This is the best I got out of it, which is pretty much the same thing printed in mico sized letters on the mobo. I can't find a + or - anywhere. http://img.photobucket.com/albums/v2...asioc/mobo.gif
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Old 05-07-2005, 08:19 PM   #4
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sounds like bad psu. i had the same exact symptoms recently.
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Old 05-07-2005, 08:32 PM   #5
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What motherboard is it?
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Old 05-07-2005, 09:41 PM   #6
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I'll try another PSU...

It's an M935 from PC Chips. I've never heard of them before and the single sided leaflet I got with the mobo didn't even have their name on it. I don't even know how I found their site. You can try viewing the manual by clicking "manual". It's all distorted for me though.

I had originally got it as a barebone off of eBay for like $100. I was slowly upgrading components on it until I eventually had enough to make a full fledged computer so I took it out. It didn't run games very well but for an office PC it would be fine. My mom's work won't give her a new (or decent) computer - it's still running Win95.
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Old 05-07-2005, 09:43 PM   #7
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Why don't you just spend another 30 bucks and buy her a Dell?
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Old 05-07-2005, 09:48 PM   #8
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Because then it would be a Dell.
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Old 05-07-2005, 10:36 PM   #9
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Is the CPU fan hooked up to the "CPU FAN" port on the mobo? Some motherboards won't boot unless they feel a fan connected to teh CPU FAN port.

EDIT: Also, start with basic troubleshooting. Unplug EVERYTHING that's not needed for the computer to POST (cd drive, soundcard, floppy, etc.) Start from there.
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Old 05-07-2005, 10:39 PM   #10
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Quote:
Originally Posted by Guru Imakuni
It seems like a short and I've put plastic under the mobo so the only connection between the mobo and the metal case is the screws.
?
Wasted effort. If you shorted the mb to the chassis the MB would be dead, as in fried.


Sounds like a dead power supply to me
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Old 05-07-2005, 10:44 PM   #11
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Quote:
Originally Posted by Guru Imakuni
I've put plastic under the mobo...
Please elaborate.
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Old 05-08-2005, 01:04 AM   #12
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Well I always short something when I build computers. Fan does that really really short spin up. The blades will just jolt a bit. No more power until the plug is removed. Always thought it was a short but I guess not. I do know it's happened on my different computers though. I was thinking it was my 9800 Pro being lame but I know that's not the case as this little junker has no AGP slot and is displaying doing this "occurance".

I put plastic wrap under the mobo between the case. Never thought you needed to but I tend to put the plastic foam that comes with mobo under it to prevent any electrical connections. Didn't have that foam so I used Saran Wrap (generic brand).
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Old 05-08-2005, 01:33 AM   #13
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Um... Saran Wrap is a bad idea. You know.. STATIC cling. Try going to Radio Shack and buying some rubber mounts to put under the board.

Also try this trick... unplug the PSU from the wall, click the PC power switch a few times, unplug the ATX connector to the motherboard...plug ATX connector back in, plug PSU back into the wall, try turning it on.

Make sure the PSU is set to 115 and not 230 also. That can cause some weird stuff and is often overlooked.
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Old 05-08-2005, 02:24 AM   #14
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make sure you have the heatsink seated properly. i remember a p4 build i did and if the heatsink wasnt competely tightened down it wouldnt post. also make sure "clear cmos" jumper is set to 1-2 instead of 2-3. if this doesnt work physically apply pressure to the heatsink. (towards cpu)
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Old 05-08-2005, 02:24 AM   #15
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I had a similiar problem with a PSU that came with a brand new case from NewEgg. When I finally narrowed it down to the PSU I yanked it out of the case and this huge chunk of metal fell out of it. It could have shorted and taken out everything attached to it. Glad I paid for the two day air shipping too... Thanks NewEgg!

Anyway, assuming you didn't fry anything already, it sounds like the power supply, but the board not even coming with stand offs makes me call into question the quality of the mb as well. Just buy a cheap PSU from a computer store and see if that's the problem, if it isn't just return it and tell them it's the wrong wattage or something.
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Old 05-08-2005, 03:40 AM   #16
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Or just take the mobo out of the case and see if it works.
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