I have just finished assembling a new PC. The new componants are: Gigabyte GA-7VAXP Motherboard, Athlon XP2100, 256 DDR Ram, Zalman flower fan / CPU cooler & a new 300Watt PSU. All other components (Soundblaster, ATI Radeon 8500, drives etc.. ) are from my existing PC. The PC will not power up the fan just twitches slightly but no HDD activity or startup. I have set all the jumper settings tried to check for any shorts, I have also tried another power supply. What is my most likely guilty componant? - or am I just being thick and missing something more obvious like the PSU not being up to the job?