Operating system wont load

i believe that i may have turned off the power switch on the wall that feeds electricity to everything in my room, while my computer was running pro tools. Now when i turn on the computer, my operating system does not load and it does not ask for my password. All i see is a blank blue screen, but my mouse is being recognized. I hope my files are not lost.What do i do to restore my OS(tiger) without losing all the files on my computer?

Hi, B. G. Welcome to the Discussions.
1. I suggest you begin troubleshooting using the process specified in my "Resolving Disk, Permission, and Cache Corruption" FAQ. Perform the steps therein in the order specified. This is a good procedure to run after a power failure.
2. A blue screen at startup can also indicate a problematic Startup or Login item. If step 1 above does not resolve the issue, my "Troubleshooting Startup and Login Items" FAQ can help you pin that down if such an item is exacerbating the problem.
Good luck!
Dr. Smoke
Author: Troubleshooting Mac® OS X
Note: The information provided in the link(s) above is freely available. However, because I own The X Lab™, a commercial Web site to which some of these links point, the Apple Discussions Terms of Use require I include the following disclosure statement with this post:
I may receive some form of compensation, financial or otherwise, from my recommendation or link.

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    ****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
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