Lenovo ThinkPad T420 Maintenance Manual

   

  

                

      

   

   

               

                  

   

              

               

   

Contents

             

         

                  

                 

               

      

                  

              

          

   

                 

   

               

             

          

     

                 

             

       

                    

              

      

                

         

                  

                

        

          

                 

              

           

         

            

           

   

               

      

                   

                 

             

            

            

         

         

              

              

             

             

             

             

              

              

             

           

            

           

         

        

   

                 

                 

             

      

                  

              

         

     

                   

         

                

            

      

                   

        

                   

                

         

                 

          

                

           

               

          

      

Bluethooth          

        

           

              

   



                  

                

                  

      

                   

           

     

                  

              

                 

              

              

                

      

            

          

           

                  

                  

                 

            

                   

                  

                  

              

          

                 

                

         

         

          

         

         

              

           

                 

       

  

          





             

           



                

          

                 

          

   



       

   

               

  

     

     

      

           

     

       

        

 

      

             

     

         

          

               

                  

    Do not attempt to lift any object that weighs more than 16 kg (35 lb) or that

you think is too heavy for you.

                 

                

    

                  

 

                

                    

               

                   

     

             

      

              

             

               

    

           

                

       

   



 

        



                  

        

               

              

               

             

              

    

    

    

     

                    

                    

           exposed      

            

            

                

    

                

          

                

 

                

     

              

             

 

            

         

 Never assume          check      

                 

         

                  

         

       with the power on        

   

   

 

   

  

     

       

     

       

        

   

       

  

              

 User Guide

  

                

               

               

               

                

        

        

               

 

            

        

               

               



          

        

     

              

              

            

       

      

   

               

 

                

        

       

                

 .   

       

             

              

                  

         



           

                 

   

             

     

              

                 

     

                 

  

                

 

                

              

              

           

            

 

              

           

       

   

           

 

 

  

 

 

 

 

 

 

  



                

                   

           



                

                   

                 

      



                  

                

                 

      



                   

                

                 

               

 .   



                    

                   

  



                 



                

    



                  

              

 

       



 .   

                 

               

                





              

               

              

             



                 

               

               



               

             

               

               

   



                     

              

       



                



       

             

          



                   

               

      



               

                  

               

 



                

                    

               

                 

          



                     

              

                  

       



               

                   

                   

                



 .   



                    

              

    



                 

   



                  

             

  



               

              

               





            

              

          



           

             

           

            

          

              

    

       



           

             

              

          



            

             

               

          



           

             

                

              

           



          

 



             

           



 .   

                 

               

          

       

 .   

       

Lenovo ThinkPad T420, ThinkPad T420i Maintenance Manual

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