where the white line is across ribbon cable, very gently use a thin pry tool under edge of black connector lock and very carefully lift up black strip, you will see it start to move, work your way along strip lifting pry tool a little higher each time, you will then here it click as it comes unlocked and it will lift up all the way along releasing old ribbon cable. refit new cable in exact position then gently press down on black strip until it clicks in place. re-assemble bezel refit simm and sd cards and away you go. Tablet now charges okay. Well mine did anyway.