Pronto charged overnight as usual, came down to find it "on" with a totally non-responsive screen.
Reset pin made no difference, I opened it up to find the batteries had leaked very slightly, cleaned it all up with isopropyl alcohol but no different.
I then swapped the display & touch screen with our other (good and working) one and proved them to be OK, the other screen & display connected to the "faulty" one also did not work.
The PCB connector where the touch screen plugs in looked a bit dirty so I cleaned that up and the screen now beeps when touched.
I then updated the firmware to fully reset it but it fails on step 4 of the screen calibration

Any ideas or help appreciated
thanks

anyone ?

I can't help you with this.

What I thought: isn't it easier to buy a secondhand Pronto 7000 or 7500?

I did that and so have two Pronto's in reserve.

But probably they are easier to get in Europe.

Fyi

[Link: ebay.com]

cheers...I found one in USA which, even after shipping & import VAT worked out reasonable.
Would still like to find out why mine doesn't work though