Hi rubill,
you have to use the original Instrument Info file (.n27) of YOUR OWN Tyros5 (not "any".n27 file from a different instrument):
Please follow these steps:
1. Connect a USB stick to your Tyros5.
2. Press "Function > Utility" and go to "Owner" tab..
3. Press "Export Instrument Info" (button "E"). This will export (save) the file "TYROS5_InstrumentInfo.n27" to the USB stick.
4. Disconnect the USB stick from the instrument and connect it to the computer.
5. Start Yamaha Expansion Manager (YEM). Be sure to use the latest version, currently it is V2.6.0.
6. Click on the "+" icon next to "Install Target" in YEM and select "Import Instrument Info". Navigate to the USB drive and select the .n27 file on the stick to import it.
7. Your "TYROS 5" should be displayed below "Install Target" now.
P.S. Please also be sure that the latest Firmware update (V
1.13) is installed on your Tyros5. To display the installed version press "Version" (buttons "7" or "8") in the "Owner" display I mentioned above.
Hope this helps!
Best regards,
Chris