building PC from scratch problem

[Bigagt]

Here's the deal. I had bought a motherboard and processor. they did not work, so i bought a brand new:

- Asus A7A266 Motherboard
and - AMD Athlon T-bird 1.2Ghz

I had:
- ATX Case with 300Watt power supply
- Coolermaster Coolong fan for socket A chips
- 128 MB SDRam
- 40 GB Western Digital hard drive
- an old floppy drive
- Voodoo 3 PCI video
- keyboard, mouse

SOOO.... I mount the motherboard, i put in the CPU, i put a spot of goo onto the processor, i hook up the fan, i plug it in, i plug in all of the little chassis wires into the motherboard, i put in the memory, i plug in the IDE ribbon and the floppy ribbon, I plug in the voodoo 3 PCI card, i hook up the ribbons to their respective drives, i plug in the power cables from the power supply to the drives, i plug in the power cable from the power supply to the motherboard. i set all of the jumpers and switches to Auto and Default. I plug in the power supply. i plug in the keyboard and mouse. i filck the switch on the back of the power supply. the LED on the motherboard lights up. I press the power switch on the chassis, and the power supply fan powers on. i don't know what's going on now. the CPU fan won't power up, and the screen stays blank. nothing popped. there's no smoke. there's nothing out of the ordinary, except that nothing happens!! I tried booting without the HDD and the floppy ribbons attached. the CPU fan is plugged into the motherboard. what is a PSU plug? is that the type that comes attached to the power supply? i unplugged all LED wires and the reset wire from the motherboard, and doubled checked if i had the power wire attched correctly. it is. the power button on the actual case works fine.

please, any suggestion is appreciated....

 

[F117NightHawk]

You know what, it could be a bad power supply or maybe you don't have the mainboard grounded properly. Make sure it's touching all its standoffs, or it won't boot. You might want to just buy a new power supply cause the ones that come with the case are usually garbage to start with. If that doesn't work, take it to a repair shop. Better safe than sorry.

 

[MacaroneePenguin]

Have the cpu fan connected to the power supply if you can and reset the CMOS. Reseting the CMOS should be in the manual.