Worried after seeing Mac mini blue screen startup and hence searching adequate way to troubleshoot the issue. If so then get adequate solution here about the same. It is very disheartening when your Mac system becomes unresponsive while boot. Although the reasons could be any of these including hard drive related issues, OS corruption, power outrage and so on which leads to Mac mini blue screen startup. Now come to its consequences, at this point you totally lose the access of Mac and therefore it is extremely necessary to resolve this problem immediately. By trying disk utility you can resolve the issue. Apart from you can also use fsck in single user mode for diagnosing your hard disk problems. But what would happen if the issue does not resolve then in that case format the hard drive and re-install the OS X in order to fix Mac mini blue screen startup. You should take backup of data before performing hard drive format because it has proven fruitful while restoring data after formatting. If somehow you have failed to take the backup then thanks to third party Mac Data Recovery Software you no need to worry about it anymore.