you need 3 things:-
1) A backup set of 4 firmware folders
2) The RK27DM recovery tool
3) The update tool here:-
http://www.mympxplayer.org/rockchip-...v25-df881.html
1) Connect your player
2) Run the RK27DM recovery tool and click the restore button
3) Open the removable device manager in windows sys tray.
4) wait for the rockUSB icon.
5) Stop the RK27DM tool when you see th icon.
6) Run the update tool.
7) load the firmware folders into the update tool.
8 ) Run the update tool and it should find your player and copy the folders in.
9) when the update tool has finished reboot your player.