Browsed these forums often and now I have a post of my own. Let me start off with the specs of my machine.
Compaq Presario V2000
Turion 64 ML-34 1.8ghz
Radeon Xpress 200M
WEll my problem started a week ago when my computer started taking forever booting up windows xp pro. Well my solution was a fresh install of windows so I reformated the drive and reinstalled windows. AFter installing I updated all drivers and software. Well when browsing in firefox 18.104.22.168 sometimes it just stops loading a page, the screen turns black and the harddrive and optical drive stops running BUT the lights and such stay on, almost seems as if it went into sleep mode but the lights remain on. I have no idea why it does this and I am so happy it didn't happen while i typed this :)