1) testmode.exe in place the sd card and then the unit
2) press the reset button at the same time with the eject button and the menu button. (Only menu, reset and eject!)
Now the LEDs of the buttons will switch on / off, wait a while then goes to TESTMODE and ready to go! the unit still attached
and so you know.
Thank you very much for helping me at all.
thanks blackh8552