Yeah, he seems to do a lot of work to Hungary, he was heading there now too.
Did some first checking. Replaced the UK with a European plug and took the plunge. I have neck-glow but that's it. Red LED on the spotkiller so probably no signal coming from the AD board.
There's a red LED on the AD board though.
Checking out the machine brings me to the conclusion that this is NOT a factory modded cab.
Why? Well here we go:
Exhibit a:

The monitor has a clear burn of Lunar Lander. It's not too clear on this picture, but I can see the "mountain" of LL and on top you can see texts like "Altitude" "Velocity" etc. All signs of that it has run as a LL for a long time. There is also Asteroids burn though, so it has been running (apparently still a shorter time because it is less) as Asteroids for some time too.
Exhibit b:

Just another Asteroids maquee right ? Wrong.....where is the Atari logo ?? Not to mention the copyright text.....
Exhibit c:

If you look at this picture you can see that the Asteroids artwork is on a thick layer. First I thought it was one of those "short" version CPO's from Arcadeshop.com but it was too thick.

Also: there is a white line around the artwork AND the game's instructions, which normally are on the bezel, are printed on this CPO !
So I removed it to see what was under it. The lead me to
Exhibit d:
{WARNING, THIS EXHIBIT MAYBE SHOCKING TO CLASSIC ARCADE MACHINE LOVERS !}

Ouch. Is that sad or what ? Maybe I can cut-out the Atari logo and make it a key-hanger ? everything else is close to EOL.
All this proves to me that it left the factory (in the US, see the serial stickers) as a Lunar Lander and was operated that way for quite some time. Then it was converted with apparently a bootleg kit.