Melvin....
A flashing question mark appears when you start your Mac
http://docs.info.apple.com/article.html?artnum=106464
1. Start up from a system CD/DVD, and repair your disk using Disk Utility:
a. Insert the Mac OS X Install or Restore disc.
b. Restart the computer, then hold the C key during startup.
c. From the Apple menu, choose Disk Utility. Do this in the first screen of the Installer. Don't click Continue. If you click Continue in a Mac OS X Installer version earlier than 10.2, you must restart from CD again.
d. Click the First Aid tab.
e. Click Repair Disk.
f. After repairing the disk, try to start from the Mac OS X hard disk.
Tip: If your hard disk is not available (mounted) when started up from CD, reset the parameter RAM (PRAM) as described in step 3, then repeat these steps. If your hard disk is still not available after resetting PRAM, contact an Apple Authorized Service Provider or Apple Technical Support.
2. Select your Mac OS X startup disk using either Startup Manager(X key at startup)
If this doesn't work, go to step 3.
3. Reset parameter RAM (option
command+pr).
then see if the computer starts up. If it doesn't, repeat step 2.
4. Reset parameter RAM (PRAM). (command-option-O-F)
Reset PRAM, then see if the computer starts up. If it doesn't, repeat step 2.
george