8-14 TroubleshootingFail to access to internal or external devices (or such devices fail to operate):T Are cables properly connected?→ Make sure that the interface cables and power cord are properly connected. Alsomake sure that the cables are connected in the correct order.T Is the power-on order correct?→ When the server has any external devices connected, power on the externaldevices first, then the server.T Did you install drivers for connected optional devices?→ Some optional devices require specific device drivers. Refer to the manual thatcomes with the device to install its driver.The POWER switch and sleep feature are disabled:T Is the server in the Secure Mode?→ In the Secure Mode, the POWER switch and sleep feature are disabled. Torelease the Secure Mode, enter the password specified with the BIOS SETUPutility.The keyboard or mouse fails to operate:T Is the cable properly connected?→ Make sure that the cable is connected to the correct connector on the rear of theserver.→ The keyboard or mouse does not operate if it is connected when the server ispowered (not applicable to USB devices). Power of the server first and connectit properly.T Are the server drivers installed?→ Refer to the manual that comes with your OS to check that the keyboard andmouse drivers are installed. (These drivers are installed along with the OS.)Some OS's allow you to change the keyboard and mouse settings. Refer tomanual that comes with your OS to check that the keyboard and mouse settingsare correct.T Is the server in the Secure Mode?→ In the Secure Mode, the keyboard and mouse are disabled. To release the SecureMode, enter the password specified with the BIOS SETUP utility.