I shut down my pc yesterday and turned it back on today, I presssed the power button on the tower and the pc makes the hard drive sound and starts whirring but i see a black screen and it just keeps making booting up sounds without actually booting up.

Also i do not see anything on the monitor while this is happening not even the the "packard bell boot screen" which is before the xp progress bar bit.

Please help, thanks. By the way this question is not posted from the pc, its from my brothers laptop.