IBM 6643 - Manual (Page 29)

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1 Standby button
2 Standby LED
3 Num Lock LED
4 Caps Lock LED
5 Scroll Lock LED
6 Mute button
7 Stop button
8 Play/Pause button
9 Volume control
10 Next track button
11 Previous track button
Rear bucket housing (rear cover) removal
Chapter 4. FRU replacements 21