clearly, phat is not compatible with computers as we all can see and these fellas are hittin her with big words that is not registering in her brain. babyphat, CPU= your main processor that makes everything work like pentium 4 3 2 1 celeron, centrino and all that. it doesn't make sounds of XP. your monitor is not connected to CPU, its connected to your graphics card that works with CPU. graphics card = a card inside your computer that works with CPU and other "computer related parts" to create a visual in your monitor. if ur computer shows monitor has no signal, then your graphics card might have been damaged or DISABLED. aba tyo check garna u have to enter BIOS mode when starting up. if we explain that to you, will take about a month to make u understand :P jk jk. so if its disabled, and u get a new card, and open up your box, and put replace your graphics card, it might work, if your current graphics card is damaged. and fountain is mentioning AGP or PCI. all AGP card, accelerated graphics processors, i think what it is, have been the same kind, but if ur computer is newer then the PCI cards have changed. so instead of asking here and trying to figure out whats wrong and getting more confused, take it to best buy whenever u want to. seems like u're not in a rush, but take it to a computer store, like best buy, comp usa, or whatever is closest around you that repairs computers. good luck! did i make it clear and simple ?