A "blown" or fried CPU will not stop the fans from turning. It sounds to me as though the PSU may have gone as you would appear not to be getting any power tot he motherboard at all. If this is the case its a relatively cheap problem to fix as PSU's can be had for £15.00 or so and upwards. See if you have a local shop that you can buy one and that will let you return it if its is not the problem.
My money is on this being the problem.