iMac reboot problem

[2blue4u]

My iMac won't reboot - or boot shortly after shutting down. Any attempt to do this will result in the flashing ? in a folder symbol. I've tried all the suggestions to counter that error code but to no avail.

It performs flawlessly at all other times and boots normally under scheduling early in the morning. It doesn't appear to be running hot.

Does anyone have any ideas?

Ta.

John

 

[2blue4u]

That was my fear - but its a fairly new hdd just a few months old.

The startup Disk Utility doesn't see it

 

[2blue4u]

It's one of these:

Capacity: 500.11 GB (500,107,862,016 bytes)
Model: WDC WD5000AAKS-40YGA1


Everything is backed up every which way and then some

It started doing this before I went on hols. I was accessing the computer every day via RDM, closing it down late in the day or evening and it would always startup in the morn. I've been back a week now and today was the first time I had cause to reboot during the day.

Yup - a call to AppleCare is needed. I just didn't have the time to faff around with this before going on hols.