hey guys, my brother has just bought himself a new CPU, RAM, MOBO, SATA HD...but it wont run?? We connected it together..everything fits nicely...everything is...perfect I beleave...but once the button is pressed to boot up...nothing happens?? the system starts up...after a second..it turns off...and another 2 seconds..it attempts to start again...but also shutsdown again...then it stops compleatly. When we first were testing it....we had the old HD in and the new HD in...it actualy worked....we got into the BIOS..dont what was needed to be done....and then he took the old HD out..and now it wont start up...even with the old HD put back in??? we reset the CMOS also...but nothing happens?? Can anyone help us in this horrid times?