Hey guys, I've been using Apple products for a few years, ive mainly only ever used the laptops but 4 months ago i decided to ditch them all and get a 20'' iMac. It worked perfectly until a few weeks ago there has just been a constant clicking noise coming from it from the moment the machine is turned on, ive looked up the problem and didnt find that much about it, the noise is loud enough that i can hear it over the t.v when its on. I rung up apple support and they went through doing the apple hardware test which found no problems, they then told me just to take it to the nearest apple store to hand it in for repairs. I went to Apple shop at lakeside where i was firstly told that i shouldve made an appointment as they cant see me otherwise, which i was never told, but they said i could leave it with them instead, they then rung me up today to say they cant find the problem im having and think its just the optical drive when the system is booting up and that my mac is ready to collect. I've asked them to go and look again as it still makes the noise after the system has been booted and has been on for hours and there is no CD in the drive, i have also tried increasing fan speeds to see if it noises differs and it doesnt, so im assuming its a hard drive fault, but they wont listen to me. What do you guys suggest doing? as it seems odd that the noise has magically stopped all of a sudden when they have it? and i dont want to drive another 70 miles to the shop if it still happens when i get it back? any ideas would be really greatful, Thanks.