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AS1041M-T2/1041M-82 User's Manual
3-3 Control Panel LEDsThe control panel located on the f ront of the SC818TQ+-1000/SC818S+-1000 
chassis has fi ve LEDs.  These LEDs provide you with cr itical information related 
to different parts of the system.  Thi s section explains what each LED indicates 
when illuminated and any corrective action you may need to take.  
 Overheat/Fan Fail: When this LED fl ashes it indicates a fan failure.  When 
on continuously (on and not fl ashing) it indicates an overheat condition, which 
may be caused by cables obstruc ting the airfl ow in the system or the ambient 
room temperature being too warm.  Chec k the routing of the cables and make 
sure all fans are present and operating normally.  You should also check to make 
sure that the chassis covers are installed.  Finally, verify that the heatsinks are 
installed properly (see Chapter 5).  This LED will remain fl ashing or on as long as 
the overheat condition exists .  
  NIC2:  Indicates network activity o n GLAN2 when fl ashing .
  NIC1:  Indicates network activity on GL AN1 when fl ashing.
  HDD:  Indicates IDE channel activit y.  On the AS1041M-T2/1041M-82 this 
light indicates SATA/SCSI and/or DVD -ROM drive activity when fl ashing.
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