troubleshooting: how to reset the Olympus OM-D E-M5 if it stops working

(from: http://ayton.id.au/wiki/doku.php?id=photo:olympusem5_reset)

see also:

introduction

menu driven factory reset

  this will lose nearly all of your settings but keep date and time
  [menu], [camera1], [reset/Myset], [Reset]

hidden hard factory reset

  this will lose all of your settings including date and time
  Power on with [menu] held down
  When LCD lights, release [menu]
  press the following sequence: [menu], [down] to spanner, [right], [down] to LCD brightness, [right] [info] [ok]
  now for the actual reset: Hold [menu]+[ok] together for a few seconds to get the hardware reset screen. [ok] to proceed.