iMac G3 snow slot drive will not boot
my imac g3 is the snow edition and has a slot drive when i went on the internet with safari the hard drive stopped spinning and i powwered it back on it went to a grey screen i dont know what to do and i am 13 dont worry though i fix computers for my friends and i am not affraid to put in a new hard drive if needed pleaseeeeee help me why does it do this and what do i have to do to fix it
iMac G3-OTHER, Mac OS X (10.4.11)