Introduction
Ridgid JobMax R8620 Series E has a built-in LED light that is controlled by a switch trigger. If your LED light is functioning properly but is not turning on, it is likely that there is a problem with this switch.
Tools
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            Pull the battery out of the case before opening the device. 
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            Remove the nine 6mm screws on the drill cover using a Torx T10 screwdriver. 
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            Lift off the outer casing. 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.