So....if you have both Beo4’s at hand you can (easily) take these apart and make one working unit.....in fact you’d just need to swap the display from the ‘old’ Beo4 to the ‘new’ Beo4/navi.
All the best wishes for you getting the V1 to work!
Some of these have an issue with the small built-in backup battery (that can leak).
Even if it is ok by now, I’d recommend that it should be replaced - it should be a rather inexpensive fix considering that rhe V1 was given to you.
It has been some years since the last update - and there will be no more.
Updating however, is very easy - once the V1 is connected to a (wired) network, you can go into the aettings to initiate the sw download over internet....if there is any.
You can also download the needed PUC codes, if you want to be able to control a connected device (e.g. an AppleTV) with the Beo remote.
As always - I would recommend a reset of the tv.!
For this reset of your V1 go to default settings, then bring up the REGIONAL SETTINGS menu and select another country. You will be asked to confirm the reset. All settings will be deleted and you must go through first-time setup, follow on-screen instructions.
The user guide can easily be found on the B&O website (or just google for it).
Beware! The tv can be pincode protected (or not) - if it is, you will need the pin code from the former owner, otherweise you won’t be able to use the tv.
MM