Thanks for your help I figured it out I needed to hold down the [C]key while it was powering on, I know, I never heard of that either but it worked, it is an older model so I am sure that has something to do with it I guess.
This is an old thread, but I'll give it a try because it's the closest I've found to my problem which is not solved by these suggestions. I have a bootable linux live cd that boots fine in my Toshiba Satellite M505D but it won't in my Satellite A105-S1712. I set cd first in the bios boot order and also tried holding down the 'c' key while booting. No joy with either...only boots to the hard drive. The cd drive light comes on when I insert the cd, but the drive is ignored during boot. Thanks and hope someone is still watching. :-)