Hiya all. I am new to this forum so hi to all who post/read this forum. I have an iMac G5 with a blank screen so changed the backlight inverter to no avail. I replaced the original inverter and reset the PRAM and after the 2 or 3 gongs got it working but the screen froze after a min or two. I turned of the computer and was back to square one.... blank screen. I can only get it to come on by resetting the pram each time??? some times i get the computer to the start screen sometimes it will freeze at the spinning cogs stage. Any help or advise would be appreciated. Thanks.