I'm already suspicious of the mainboard being DOA...but try a few test first:
Remove all cards, all but one stick of memory, all drives, and all front pannel connectors. Short the power switch pins with a small screwdriver. If it does not start, it is probably the mainboard (lowest quality of your 3 new parts by far). If it does start, just start plugging stuff in 1-by-one, starting up each time untill you find the bad part, or untill it starts with everything installed.
All is working now, thanks everyone for your help, basically it was the floppy drive that was stopping it loading up, so i just took it out. 2 things if any one could help me, i have:
Corsair 4Gb (2x2GB) DDR2 1066MHz/PC2-8500 XMS2 Memory CL5 (5-6-6-18) 2.1V
In the bios it comes up with 4gb but in control panel --> then system, it says it only has 2.93gb ram,, why is this?
