It was decided that Linux Mint 11 would not display a boot splash screen during startup due to the problems with Plymouth and proprietary drivers which resulted in inconsistency. If you do not see anything whilst the computer is booting up, take a look at the disk activity indicator this should show that Linux Mint 11 is indeed starting up. If however you do not see anything then try booting using the recovery option if you have already installed, if you are booting from the Linux Mint 11 Live disk then try selecting the “Check the integrity of the DVD” option and check the disk, this may be the cause or worst case then your hardware is not compatible with Linux this is highly unlikely though.
There are several methods detailed to get a boot screen working but on my hardware I could not get the boot screen to work, this may well be due to me running Linux Mint 11 in a virtual machine as a guest under Linux Mint Debian Edition. So I have not included the instructions for now until I see them working.