Hardware Interface 21Image Server Hardware InterfaceFront Panel FeaturesPower ON/OFF buttonThe blue front panel button initiates start-up and shut-down of the Image Server. Pressit momentarily to start the server. A sequence of start-up screens will appear, ending with the3-channel graphic user interface.When the Image Server is running, pressing the blue button momentarily will cause thesystem to begin an orderly shutdown. In the event that the system has stopped responding tocommands and will not shutdown, hold the button in for 4 seconds to force a power down.Do not use the rear panel switch on the power supply to shut down the Image Server.Abrupt power loss can cause loss of information stored on the disk array. The rear panel powerswitch can be used to prevent re-application of power during service procedures once thenormal shut down sequence is complete.IndicatorsFive blue LED Status Indicators appear on the front panel. These indicators areilluminated continuously when the system is functioning normally. See the table Front PanelIndicators on page 103 for diagnostic meanings.