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It does help!.. you got me to be a bit more rigorous.... the two USB sockets on the front of the PC work fine for most things but not the PRS505... swapped it for the rear USB keyboard socket and we're on. (and the keyboard works fine on the front socket) ... so it does look like a power thing.. Strange coz the front USB ports power laptop USB hard-drives with no extra power. But then USB is a bit of a dark art at the best of times :-)
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