2011 mac mini won't go past white screen with apple logo

Hi ..

If you have v10.7 Lion installed, use Lion Recovery to repair the startup disk if necessary, or reinstall the Mac OS X.

If you are running a prior Mac OS X, boot from your install disc, run Disk Utility. The startup disk may need repairing > Using Disk Utility to verify or repair disks

And try Resetting your Mac's PRAM and NVRAM

Step by Step to fix your Mac