hello there, im a newbie here so please be kind! i have been given a imac g5 17" (1994) white without isight that is broken. when you power it up there is either nothing apart from the white power light or sometimes the light blinks and i hear three loud beeps. i have googled the problem and there are a lot forums posted about ram being dodgy or unseated, none however offer a cure! im hoping the clever people at appleinsdier might help! ive already opened the...