i replaced my g3 with a g4 two days ago all was well till sat afternoon noticed mac was still on even though i had put it to sleep earlier,re entered the sleep command no reaction so i turned it off by the tower button.i may have even had to pull plug to get it turned off.latter went back and no boot!just a gray screen with a pic of a file and a flashing question mark.i have a set of g4 osx install and software restore [4] disks but they are os10.2 i have 10.3.9 now. what would a course of action be?thanks, to further add i put start disk one and went to first aid but after done machine went to a blue screen with a turning clock [cursor] and two rectangles left one with a arrow in a circle right one with a arrow pointing to the right.times out in few minutes leaving the symbols and cursor able to click but no happens,i am absolutly new to mac so be specific please !i got info for first aid from a co worker not complete instruction. never did this before.