Power Supply died

My Problem

The iMac had been making a gradually louder electric buzzing (like an old fluorescent lamp) noise when the screen came on. After a while, the whole screen would go black and the computer would occasionally crash.

My Fix

The repair took all of half an hour. It was very simple and straightforward. Pop off the screen, remove a few screws, out with the old and in with the new. The computer is now near silent and running flawlessly again.

My Advice

Make sure when placing the glass back over the screen that every speck of dust has been removed, no matter how small you think it is. You may not see it while the screen is off, but it's the most noticeable thing in the world while the screen is on.