I cannot boot in service mode (blue screen) my F500BT.
I boot the device (with the power-up button) and when the splash screens is shown I push the power-up button (the one in the bottom of the front panel) together with the reset button for 5 seconds, however I don't get into the blue screen.
I tried also to push the 2 buttons in other ways (do it at different times of the startup phase, keep them on for more than 5 seconds, boot with or wothout the SD card....) but nothing changes. Depending on the situation I get the normal boot sequence or the device turns off.
Any suggestions you can give me ?