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New PC built! Problem, please help!


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#1
Phantasy66

Phantasy66

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Recently I tried building a new PC with my friend (who did all the work because he knows what he is doing). He built the computer (on a static prove mat and took all precautions). Once assembled, we tried powering it up, but nothing happened. For some reason the keyboard caps lock, number lock etc were flashing. His dad who can also make it checked everything was connected properly and it was. So we presumed it was the PSU because no power was going to the motherboard so we replaced it. Tried it with the new PSU, same thing happened. Tested the power running through the motherboard, removing each component one at a time, but still no luck. The power in the motherboard kept tripping. So the motherboard was replaced and still the same thing happens.
Please help!!! Thanks for any suggestion. Specs below
2GB Kit (2x1GB) DDR2 800MHz PC2-6400 240pin
http://www.ebuyer.co...uct/116357/rb/0
720W PSU
http://www.dabs.com/...k...&PageMode=1
EVGA S775 nForce 650i Ultra ATX A L
http://www.dabs.com/productview.aspx Quicklinx=4JH1&CategorySelectedId=11143&PageMode=1&NavigationKey=11143,405070000,356410000,4294959071
Intel Core 2 Duo E6600 (2.4ghz) Socket 775 FSB1066 4MB Cache Retail Boxed Processor
http://www.ebuyer.co...uct/112706/rb/0
EVGA 8800GTS 320MB GDDR3 DVI TV Out PCI-E Graphics Card
http://www.ebuyer.co.../product/125105
NEC Optiarc AD-7170S-0B 18x DVD±RW/DL/RAM Serial ATA Black - OEM http://www.ebuyer.co...duct_uid=125208
Seagate ST3500630AS 500GB Hard Drive SATAII 16MB Cache 7200RPM - OEM
http://www.ebuyer.co...uct/113428/rb/0
XION II Black(Green LED) Steel Mid Tower Gaming Case - No PSU
http://www.ebuyer.co...uct/108007/rb/0
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#2
wannabe1

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Hi Phantasy66...

When you installed the mainboard, did you use the standoffs to raise it off the chassis? What you describe are the classic symptoms of the mainboard shorting to the case. It needs to be isolated from the case and using standoffs provides this isolation. Make sure they are located only at the mounting locations...one in the wrong place can also short the board to the chassis.

To see if this is the cause, assemble the parts outside the case and see if it will power up.

wannabe1
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#3
Phantasy66

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Already tried :) still wouldnt work
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#4
wannabe1

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I'm assuming you hear no system beeps.

The next link in the chain that causes these symptoms is the processor. Is it installed firmly in the socket? Any bent pins?

How about the thermal compound? Do you have good contact between the processor and the cooler? Did you use thermal paste or a thermal pad between cpu and cooler? Processors will overheat almost instantly without proper heat sinking.
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#5
Phantasy66

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Nope i dont hear any beeps :)
Heat sink seems to be fine and my friend used thermal paste.
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#6
wannabe1

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Next link is the mainboard power connectors. Your board has a 24pin main connector and another 4pin connector near where the PS2 ports are. Are these both connected properly?
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