So I've treated my Oly E-500 pretty in the time I've spent with it. Which is why it came as such a great surprise when I lost flash functionality. My on-board flash will not fire, on auto or manual. Though my external FL-36 works on its own when I test fire it, but when I try to use it on the hotshoe, it doesn't work. Is there any fix for this? I'm told I could be charged upwards of $300 just to get the problem diagnosed. Hopefully I can avoid this.