Hello again from the owner of the Naughty KN7000.
Come on TECHNICS buffs.
In 5 weeks there has been 1820 viewers with 26 replies.
A few more will make it 2000 and then NIGEL will put a flame icon to it.
I will add a further comment that I haven't already given.

Before the K7 misbehaved I was guilty of checking out some floppy discs that had KN7000 styles on them that came from a distant contact.--- Probably most of us have done that from time to time.
I have now heard from a friend in New Zealand that some years ago 2 owners of KN5000 [?]-- in a Keyboard Club-- had used and swapped a obvious suspect disc and both keyboards crashed.
I don't know to what degree BUT surely there are out there Technics users that have heard or experienced a simmilar fate
and how many discovered a remedy.
My wife and I are grateful for the helps so far.
We as owners are the sufferers, so lets keep this alive for a while longer, yet in the hope that it will be somehow a help or even warning to others.
I WILL REFRESH YOUR THOUGHTS AGAIN WITH SAY 6 NOW FAULTS.
[1] Midi and Tech Modes reversed.
[2] Won't select Fingered mode [ hence discords ]
[3] APC stays lit all the time.
[4] Wants to play all recorded songs at a 300 speed.
[5] Only every 2nd panel memory button works.
[6] Performance pad green light stays lit all the time.

Seems like the internal FLASH MEMORY has been the only suggested culprit from sme viewers.
Lets see how long it is before Nigel puts his 2000 Viewers flame to this post.

However the KN7000 can still be played perfectly as a straight PIANO.

Thanks again from Dave L.