New build will not power up, PLEASE HELP

Ok so im putting together a nice little budget system for my parents which consists of the following components

Gigabyte GA-ma69sh3
AMD Athlon 64 X2 4000+ Brisbane
2gigs Crucial Ballistix ddr800 4-4-4-12
160gig Samsung Spinpont
Samsung dvd/cdr-w
Coolermaster Centurion 5
Antec Earthwatts 430w

Ive already returned one motherboard that didn't work, so Im on my second one and I am having the same trouble. I installed everything and press the power button and it doesn't turn on. I used the process of elimination, trying different power supply, cases switches, tried the cpu and memory on a known good system....etc Everything checks out, so the problem has to be something to do with the mobo. So I was fooling around with it trying everything I could think of and I finally got it to start up, I removed the Cmos battery and cleared the Cmos and it finally starts up, it POSTS and everything looks ok, but i do get a weird message that says something like K8 NPT Data change… Update New Data to DMI, then it says something like using default settings and then windows XP boots up normally. But when i restarted and put the Cmos battery back in, I got the same trouble with the system not turning on at all, sometimes clearing the Cmos and removing the battery works and other it till wont start up?? Does anyone have any ideas, because im really getting frustrated with this motherboard!!!! Thanks in advance for any help.
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  1. Here is what I would do Frankie, remove the motherboard from the case and put it together on a table. It sounds like a grounding/short issue. I wonder if, while fiddling with the CMOS battery, you shifted the board to where it was not shorting and it started up. I know it probably sounds like a long shot, but crazy stuff happens sometimes.
  2. Thanks for the reply. I havent even installed the mobo in the case yet, after the first board didnt work I decided not to install it into the case until after I had it working. Any other ideas?? Now I cant even get it to start at all even after removing ther battery and clearing the Cmos. The borad is getting power though the lights on the keyboard blink on when I turn on the switch on back of the psu, so its gotta be some sort of switching problem, is it possible it could be stuck in a sleep mode or soemthing?
  3. If the clear cmos jumper is on clear position, the pc won't start up whatsoever. also, check the other jumpers are in default positions.
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