Help - it won't start!

[Rob M]

I have a 400 made by VD Tech and it has just stopped working for some reason.

It ran out of power while I was last using it and closed down. Now it won't boot up:

It remains on the initial boot up page (with the flashing curser in the corner next to 'V70') for about a minute or two, then it says 'closing the system' (with a little penguin in the corner) , then this page fades away and the initial boot up page comes back. If I leave it, it just does this loop forever!
I've pressed the reset button on the bottom but that doesn't work.
What can I do???

[Trygve]

Have you tried to boot it into diagnostics?

I think it's reached by pressing [F3] during startup.
(I'm on holidays at my brother's and don't have mine available)