24-inch 2007 iMac Hard Drive
5 - 15 crwdns2876718:0crwdne2876718:0
Original Hard drive failed in my iMac EMC2134. Symptom: On boot up the machine chimed but then the drive made a clicking sound and Startup software couldn't be found, nor any of the startup services with option keys pressed! I was left with a grey screen and a flashing folder with a question mark inside!
The hard drive repair was unbelievably straight forward. Anyone that can follow instructions and turn a screwdriver could do It. The only real issue I had was working with the two T-6 screws on the LCD connection. These were short and fiddly to handle. A magnetic tipped driver would come in handy here as the screws fell between and under other components when being replaced and I had to fish them out. Working in a dust free environment is essential for seamless LCD cleaning and screen cover replacement. I used the disk utility on an existing CD ROM of iOSX Snow Leopard to format and partition the drive and then install the operating system, security updates and then upgrade to Yosemite. Perfect, and couldn't be happier!!
Don't underestimate your ability to fix your iMac! With great technical directions from ifixit, you can't go wrong!! Happy as a clam and now looking for other items to ifixit!
Only advice is use of a magnetic tipped T-6 driver on the LCD connection as noted above.