Battery is almost certainly flat. Switch it to the "check" mode to test it. To release the shutter change the speed to B
http://www.mir.com.my/rb/photography/hardwares/classics/olympusom1n2/om2/htmls/index.htm
@danb started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
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Battery is almost certainly flat. Switch it to the "check" mode to test it.
To release the shutter change the speed to B
http://www.mir.com.my/rb/photography/hardwares/classics/olympusom1n2/om2/htmls/index.htm