I tried to install this firmware:
https://www.mobileread.com/forums/showthread.php?t=64510
because I wanted the browse by folder feature, and now I think my PRS 505 is broken!
I bought the reader in the UK, so when I tried to flash it I got an error message saying that the flasher was not compatible with my firmware.
I tried to use the Sony updater to reflash my firmware with the US version.
It erased the old software and said it was writing the new software to my reader, but that's as far as it got.
Now, I get a message (on the reader) telling me that the update failed, please try again.
When I connect it to the PC, it says 'Updating firmware now', but the same thing always happens, it will tell me that it's erasing the old firmware, then that it's writing the new firmware and then nothing.
Most alarming of all is that I am unable to reset (soft or hard) because sliding the power switch does nothing, as does pressing the reset button.
I tried downloading the UK software from the Sony site, but it doesn't appear to have a firmware flashing utility, just the library software.
Any ideas?