When the batteries on your Dell KM636 keyboard are running low, some keys may stop working. More often, the C, E, and Esc keys stop working.
Also, when batteries run low, your whole keyboard can stop working.
Some Keys Not Working
Replace the batteries of your keyboard with new or fully charged batteries.
Keyboard Stopped Responding
Check that the power switch on the keyboard is On
Figure 1: Dell KM636 power switch |