After you deleted the files, did you empty the trash?
If not, then you did not free up any space and are probably using more space than before.
If you did, then try starting up from your OS X Install DVD and repairing the Macintosh HD.
and then maybe > About disk optimization with Mac OS X
Yes, I emptied the trash, so there should have been some room (I had received a 'start up disk almost full' message, that's why I was deleting some photo files. If I reinstall from the original CD, does that wipe out everything that hasn't been backed up? That's if I can find the original CD, I'm sure it's somewhere but as I said, this is quite an old computer!
Dissconnect everything except for a wired Keyboard & Mouse and startup holding the Option Key.
If you see your Macintosh HD, try starting up from it.
If it still does not startup:
1. Startup from your Mac OS X Install disc:
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu.
3. Click the First Aid tab.
4. Click the disclosure triangle to the left of the hard drive icon to display the names of your hard disk volumes and partitions.
5. Select your Mac OS X volume.
6. Click Repair.
If in step 4 there is no Macintosh HD in the Drive List, then your HDD has probably bit the dust.
In that case, you will need to contact your local Apple Store or AASP and have the iMac serviced.
Hi there. I have the same problem and found your thread. I could get to the start up disc screen (holfing down option key - only thing that has worked all day - in southern hemisphere so almost 8pm. However, after selecting the relevant startup drive, nothing happens. Any ideas?
I had the same outcomes as joolzm when trying to boot up with the original instal disc or the snow leopard I upgraded to last year.