Help! Help! problem with my desktop

[uzumaki]

Is there anyone can help me?? I have a problem with my desktop, my cousin accidentally click the f11 while starting the pc and then a message pop out then she select cd/dvdrom something...then the pc restart but it's not functioning again. The keyboard, mouse or even the monitor not light on the only thing that turned on is the cd/dvdrom?? Ii already tried other hdd but nothing happens, when the cpu light on the only thing functioning is the cd/dvdrom.. what happen? how I can restore it?Please..Please someone help me Thanks!

 

[ATMINSIDE]

Is the default boot device set to the hard drive?

 

[Itachiii]

Clear the CMOS either by using a jumper or remove the battery that's on the motherboard for 1 minute then put it back on and try again.