Introduction
One possible reason for your device not powering on is a damaged power switch. Use this guide to replace it.
Tools
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            While pressing the spindle lock button, unscrew the collet nut and remove it along with the brass collet. 
 
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            To remove the front panel, pry the device apart while holding the device with the other hand. 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.