I recall that there's a certain key/button combination that has to held down as the power is switched on to invoke a diagnostic mode on the PSR-8000. I think this also displays the PROM version.

Can someone please tell me how I get to this diagnostic mode?

Many thanks in advance.

Ofcourse,

If you press C#2, F2 and G#2 holding down when switching on the machine, you will see TEST MODE.
If you press Start/Stop (arranger)than you will see the version like 1.08 where I think it is the latest version.
Also you can check the whole keyboard if you press more times on the Start/Stop button.

Good luck!
René

I've been looking a littlebit further and also discoverd that if you push tempo + or - you can scroll through the test menu....

RenéT