Dell XPS won't boot up

P4 should be located near the CPU for auxiliary CPU power. It is usually 4 pins

 

My Dell XPS 600 won't boot or show video, I got a recommendation from Tmagic650 about the P4 plug I asked about but there is no pull receptical fori t. I have looked at every square inch of that board and it looks like everything is attached correctlly P4 plug is the only loose plug I have left and can't find where it plugs into. What I did is the computer crashed and I replacedt he motherboard from a 32bit to a 64 bit. Go a XPS 600 512mb video carda nd havet ried several otherg ood cards and the darn thing won't boot. I get 2 beeps and lights on the front panel 1,2,3, 4 is off. Indicates in the Dellb ook it's a wire problem. Anyway got it in the shop having them check it out hopefully they will find out what is wrong with it and be a cheap fix. Doesan yone know of a good free TV tuner software? What Windows media center did? The schedule updates don't update. You have to figure outt hec hannel and time you want to reccord and it does but it doesn't give a name or anything on whatt he program you are recording. Thanks all and Thanks Tmagic60.