First Built computer wont turn on properly

[AngryAgent]

Ok, I have all the parts all connected with each other as said by the instruction manuels and online guides I've found.

My problem though is that nothing will turn on when I press the case power switch.

However all the fans go off, all the lights flash , and beeps go off when i connect the PSU 20 pin connector to the motherboard and they won't go off until I turn the PSU off or remove the connector.

The parts im using:
CPU: AMD Athlon 64 X2 4200+ Socket AM2 BOX CPU - Windsor
Memory: US Modular 1024MB PC4200 DDR2 533MHz (I bought 2 of these)
PSU: Ultra 500W X-Finity Power Supply 120mm Fan / Black/ SLI/ SARA-Ready
D Drive: NEC ND-3550 Black 16x DVD Burner in Retail Box
HD: Seagate 320GB Serial ATA HD 7200/16MB/SATA-3G
MOBO: Gigabyte M55SLI-S4 Socket AM2 Motherboard
Case: Cooler Master Centurion 534 Blk Case
Video Card: XFX GeForce 7600 GS / 256MB GDDR2 / SLI / PCI Express / Dual DVI / HDTV / Video Card (Bought 2)

I tried connecting everything outside of the case and all the parts seem just fine.
I fear having to make RMA's

Any ideas?

Also, how do you "short pins" using a screwdriver ?

[webbhost]

My problem though is that nothing will turn on when I press the case power switch.

However all the fans go off, all the lights flash , and beeps go off when i connect the PSU 20 pin connector to the motherboard and they won't go off until I turn the PSU off or remove the connector.


Could you explain that in a little more detail.. you say nothign turns on but you also mention lights flashing - meaning something "does" turn on?

[schusterjo]

1) Remove EVERYTHING from the case
2) Set the motherboard on a non conductive surface. The motherboard box is perfect for this. .DO NOT PLACE THE MOTHERBOARD ON THE STATIC BAG! The outside of some of these can actually conduct electricity! We are going to try and assemble a running system outside of the case.
3) Install the CPU and heat sink.
4) Install the RAM (only install 1 stick for SDRAM, 2 for RDRAM)
5) Install the video card. Do make sure the card is FULLY seated.
6) Connect the monitor to the video card.
7) Connect the power supply to the motherboard. Do make sure you plug in the extra power connector [if used]
8) Connect power to the power supply
9) Do NOT connect ANYTHING else. Make sure you have the power connector on the CPU fan connected.
10) Use a small screwdriver to momentarily short the power switch connector on the motherboard.

If all is well, it should power up and you should get a display. You now have found you have a mounting problem. The board is shorting to the case. If not, then you most likely have a faulty component. You will need to swap parts with known good units ie power supply, cpu, ram, video card.

[schusterjo]

What to short with screwdriver?
Its simply the 2 pins the front panel power button connects into on the motherboard.
http://www.freeimagehost.eu/thumbs/454b5b5344.gif (http://www.freeimagehost.eu/image/454b5b5344)

http://www.freeimagehost.eu/thumbs/1048c35345.gif (http://www.freeimagehost.eu/image/1048c35345)

Simply touch the 2 power on pins together with a screwdriver and it will turn the computer on just like pushing the power button would.