H133421 - 3516 ON/OFF BUTTON STICKS WHEN PRESSED                               
                                                                                
                                                                                
 SYMPTOM:                                                                       
 The on/off button sticks when pressed in.  Once the button is                  
 stuck, the 3516 cannot be turned off or on.                                    
                                                                                
 PROBLEM ISOLATION AIDS: NONE                                                   
                                                                                
 FIX:                                                                           
 The white plastic power button must be removed from the front                  
 cover and modified.  It is not necessary to power-off the                      
 DASD enclosure or system to perform this procedure.                            
                                                                                
 1. Remove the main cover assembly.                                             
 2. Remove the four hex-head screws that attach the front plastic               
    panel to the metal cover assembly.                                          
 3. Once the front plastic panel is removed, the on/off button                  
    legs are exposed.  Squeeze the legs together and push the                   
    button out of the front plastic panel.                                      
 4. Once removed, the button must be modified.  On each                         
    side of the square button are two 2mm x 4mm rectangular                     
    pads (8 total).  Using a file or blade, remove material                     
    from the 8 small pads.  This will eliminate any bind                        
    between the on/off button and the square opening in the                     
    front plastic cover.                                                        
 5. Install the modified button (with spring) and test.                         
 6. When the button operates properly, reassemble the cover                     
    assembly.                                                                   
                                                                                
 Engineering is taking action to correct this problem in new                    
 parts.