Hey
Check to make sure theres no discs in the drive or usb devices connected. If not then try resetting the bios to deafaults
Press f2 when turning on. Once in the bios tap f9 and the ok to reset deafaults then press f10 to save and exit.
If its the same then you could try a facory reset. Turn it on and tap f9 and it should load you into the recovery area.
Let us know if you have any issues.