Need assistance... iMac won't start up - Possible serious problem

[alexf]

Hello,

If anyone out there and can help me out with this, I would be very grateful.

I was working on my iMac (last year's model) today and the finder hung up (beach ball spinning). I force quit the finder, but it then refused to relaunch (although I could use other programs as before). I then tried to restart the computer but couldn't, and had to force the power off by holding the power button for a few seconds.

Now when the computer starts up, it gets to the point where the "loading wheel" (with external spokes) starts turning, but then this "wheel" freezes.

I put in my TechTool Pro 5 disc to start it up from that, but the same thing happens (yes, I have been holding down "C" when it starts to make sure that it uses it as a start-up disc).

I am at a total loss, and live far from any computer repair store. Any advice would be GREATLY appreciated!

Thanks in advance.

 

[spinnerlys]

Have you tried any of these steps?

Mac doesn't boot
Resolve startup issues and perform disk maintenance with Disk Utility and fsck
Troubleshooting: My computer won't turn on​

 

[alexf]

Have you tried any of these steps?

Mac doesn't boot
Resolve startup issues and perform disk maintenance with Disk Utility and fsck
Troubleshooting: My computer won't turn on​

Thank you very much for you reply. I have resolved the problem.