my xp no longer turns on. no light at all. the power supply unit's light is still on but the whole cpu in no longer showing "no signal" but is completely dead. i live in columbus ohio. what stores that sell motherboards? and do i have to get a new mtherboard as long as the models applies to windows xp? or just other cpu motherboard will do? on top of that what about the cmos battery? if the battery dies, does that mean the motherboard will go die? if i were to get a new cmos battery then the motherboard will be fine?