Does anyone know how to open a Sonicare HX8912 or HX8910.First number is box part number and second is on bottom of brush.I took off the bottom but pushing hard on brush shaft end doesn't cause assembly to pop out.I don't want to break it pushing too hard,if there is some other way to pop out the innards.

Better discharge that cap,so you don't suffer a 250V shock.

I'm guessing that the screen is OK and the wiring/connections is the problem.