38Using Support ToolsNo boot device available — No bootablepartition on hard drive, the hard drive cable isloose, or no bootable device exists.If the hard drive is your boot device, ensure•that the cables are connected and that thedrive is installed properly and partitioned asa boot device.Enter system setup and ensure that the boot•sequence information is correct. See theService Manual on the Dell Support websiteat support.dell.com/manuals.No timer tick interrupt — A chip on the systemboard might be malfunctioning or motherboardfailure. See theService Manual on the DellSupport website at support.dell.com/manuals orsee “Contacting Dell” on page 57 for assistance.USB over current error — Disconnect the USBdevice. Your USB device needs more power forit to function properly. Use an external powersource to connect the USB device, or if yourdevice has two USB cables, connect bothof them.NOTICE - Hard Drive SELF MONITORINGSYSTEM has reported that a parameterhas exceeded its normal operating range.Dell recommends that you back up your dataregularly. A parameter out of range may or maynot indicate a potential hard driveproblem — S.M.A.R.T error, possible hard diskdrive failure. See “Contacting Dell” on page 57for assistance.