Q: Blue screen

•Your Mac won't start up in Mac OS X (Mac OS X 10.3.9 or Earlier)

http://support.apple.com/kb/ts1411

•Mac OS X: Gray screen appears during startup:

http://support.apple.com/kb/ts2570

{May not help with 'blue screen' start issue}

•Resolve startup issues and perform disk maintenance with Disk Utility & fsck:

http://support.apple.com/kb/TS1417?viewlocale=en_US

See this as a troubleshooting + resolution process, not necessarily an answer.

•OS X Panther Solutions:

http://www.macattorney.com/panther.html

•OS X Maintenance and Troubleshooting:

http://www.macattorney.com/ts.html

•The X Lab: The X-FAQs

http://www.thexlab.com/faqs/faqs.html

• Mac OS X v10.3 Panther Manuals

Hopefully this helps resolve OS X 10.3.9 issues.

Another item to check may be the 3.6v PRAM

battery, since they can fail & need replacement.

Good luck & happy computing!