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10-24-2006, 07:45 PM
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#1 |
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Techphile.
Join Date: Nov 2003
Location: San Francisco Bay
Posts: 5,959
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New build not powering up
I just assembled a new computer. The specs are as follows: Asus A8N32_SLI, OCZ 700W GXSSLI PSU, AMD 939 3500 Winchester CPU, stock AMD HSF made for AMD FX-57, WD 500 gig HD, 2x1gig Crucial DDR PC 3200 DDR400 RAM, e-VGA 6800 Ultra graphics card.
I turned on the power and nothing. I then removed the motherboard from the case, connected all the power connectors to the mobo outside the case and still nothing. I disconnected the PSU from everything and ran a jumper from the green test wire on the main power to the mobo to an adjacent ground. The PSU powered up and the voltages for 3v, 5v and 12v are all to specification according to my multimeter. I also removed the graphics card before testing the mobo outside the case but left the RAM in the sockets and left the CPU and HSF in place as well. I then connected all the power cables (the 20x4 main power, the 4 pin square and the molex connector) turned on the PSU and there is no voltage on any of the 3, 5 or 12 volt connectors. The green LED on the board comes on though. Of course with no voltage, the CPU fan does not turn. For some reason, the PSU does not power up when connected to the mobo but powers up fine when it is jumped. What might be the problem? Thanks
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Asus P8P67 WS Revolution | Intel 2600K @ 4.7 GHz | Win 7 Pro 64 |8 gigs Corsair 1600 | Two Diamond 6990's in Crossfire| Corsair AX1200 | Thermalright Silver Arrow | Western Digital Black 2TB 64 meg cache | Lian-Li PC-A71B | Logitec Z-5500 | Three Asus 26" VW266H monitors running under Eyefinity | Last edited by David M; 10-24-2006 at 07:52 PM. |
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10-24-2006, 08:00 PM
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#2 |
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Shiro Usagi
Premium Member
Join Date: Sep 1999
Location: Kaneohe, Hawaii
Posts: 34,002
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Did you try another power supply yet?
 Cricket
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10-25-2006, 05:26 AM
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#3 |
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Forum Administrator
Staff
Premium Member
Join Date: May 2000
Location: Joplin MO
Posts: 37,765
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Well, its down to bad ram, cpu, or motherboard. Pull the ram next - the board should still start with no ram or video card.
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10-25-2006, 05:46 PM
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#4 |
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Techphile.
Join Date: Nov 2003
Location: San Francisco Bay
Posts: 5,959
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I pulled the RAM and tried a different PSU. The results are that the PSU still does not power on.
Will a motherboard allow the PSU to power on if the CPU is not in the socket? |
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10-25-2006, 05:47 PM
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#5 |
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Not so new
Join Date: Aug 2006
Location: Maryland, United States
Posts: 2,576
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__________________
“To me there are three things everyone should do every day. Number one is laugh. Number two is think -- spend some time in thought. Number three, you should have your emotions move you to tears. If you laugh, think and cry, that's a heck of a day.” - Jim Valvano |
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10-25-2006, 06:02 PM
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#6 |
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Shiro Usagi
Premium Member
Join Date: Sep 1999
Location: Kaneohe, Hawaii
Posts: 34,002
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Gee, it's starting to look like the motherboard went bad.
I've never tried to power a motherboard up without a CPU...guess you could try and see what happens. Cricket
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10-26-2006, 08:24 AM
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#7 |
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Forum Administrator
Staff
Premium Member
Join Date: May 2000
Location: Joplin MO
Posts: 37,765
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No, it will not power up at all without a CPU.
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