i started up my mac today and it has a blinking folder with a question mark in it,
im guessing its the hard drive thats crashed?
i restarted it and held down the option key and no "Macintosh HD" was there, so i then tried to reformat it by putting in the disk1 that came with my imac but that gives me a error too.
after putting in disk one and clicking install it has the installing bar for a few minutes. (INSTALLING BAR. NOT THE CHECKING DISK).
After a few moments it says "Install Failed" "The Installer cannot prepare the volume for installation. You may need to prepare your disk using Disk Utility."
Any help asap?;)
It can mean several things. The "AMOT" portion of the message says that one of the fans inside the iMac isn't working, typically the one on the hard drive. One person had that error which turned out to be a RAM issue. You could reset your RAM to see if it makes a difference, however, my guess is that this is related to the hard drive issues. If the fan isn't working the hard drive could have been cooking itself.
See this on how to reseat the memory, essentially just pulling each memory card out then pushing it back in. Then run the Apple hardware test again.
Assuming that doesn't fix it, I would take it in for service to he Apple store, as there's not much more you can do.