I have emachine w3400 not powering . plz help

thanks , i got the problem solved, i had the power cable that comes from the front panel where the black and white wires that conects to the mother board . it was not connected in the right pins, there are 3 sets of wires that comes from the panel , Power switch wire, Power Lcd Light, and Hdd led light, i had them connected up right , but i kept trying diffrent ways tell , i finaly pluged the black and white wire on the mother board side ways on the top first 2 pens form the right . then i pluged in the power cord in the back , pushed the power button than here you go fans and pc booted right up. but now i still cant figer out where the other 2 set of wires for the hhd and power light go to make them light up. i tried to plug them every where but nothing happend. wired so i think the power switch and the cable must be connected in the right spot to make the machine works. ( now i have the other emachine T1840 that the power supply box is out and the power cable switch on the front panel broke off form the wire that connects to the mother boards. any one know where i might buy or find the power switch with the cable .... plz help thanks a lot thanks , i got the problem solved, i had the power cable that comes from the front panel where the black and white wires that conects to the mother board . it was not connected in the right pins, there are 3 sets of wires that comes from the panel , Power switch wire, Power Lcd Light, and Hdd led light, i had them connected up right , but i kept trying diffrent ways tell , i finaly pluged the black and white wire on the mother board side ways on the top first 2 pens form the right . then i pluged in the power cord in the back , pushed the power button than here you go fans and pc booted right up. but now i still cant figer out where the other 2 set of wires for the hhd and power light go to make them light up. i tried to plug them every where but nothing happend. wired so i think the power switch and the cable must be connected in the right spot to make the machine works. ( now i have the other emachine T1840 that the power supply box is out and the power cable switch on the front panel broke off form the wire that connects to the mother boards. any one know where i might buy or find the power switch with the cable .... plz help thanks a lot