
On the MLC 64, the LEDs are numbered as follows:
LED Number  | LED Location  | 
  | 
  | 
1  | Transmit red  | 
  | 
  | 
2  | Transmit green  | 
3, 4, 5, 6  | Four LEDs behind “Display” text  | 
  | 
  | 
7  | Button row 1, first LED (button 1)  | 
  | 
  | 
8  | Button row 1, second LED (button 2)  | 
9, 10, 11  | Button row 2, LEDs 1 through 3  | 
  | 
  | 
12, 13, 14  | Button row 3, LEDs 1 through 3  | 
  | 
  | 
15, 16, 17  | Button row 4, LEDs 1 through 3  | 
18, 19, 20  | Button row 5, LEDs 1 through 3  | 
  | 
  | 
21 through 32  | Not used (The status is always 0.)  | 
Each digit in the X21@ number can be 0 through 4, representing the following possible LED statuses:
0 = off
1 = dim
2 = on (bright)
3 = slow blink
4 = fast blink
 NOTE: Unless otherwise indicated, commands are not 
MLC 60 Series MediaLink Controllers • SIS Control | 57  |