I had this happen to my Volkslogger about 7 years ago; it was then 11 years old. I had it cal'd and had the internal battery replaced a year before. All indications were correct, except I couldn't get the flight to download. I sent it to a dealer in the US, who couldn't help, and I ended up having it shipped from the dealer to the factory (I tried everything I could think of - new converter (known to work with another pilot); new laptop known to work with another VL).

If I recall correctly, there was a component on the motherboard that had given up... This was on day 7 of a trip to Minden, with a 444 km flight - then my longest - on it. The first 6 days worked perfectly, same computer, same usb-to-serial adapter, same laptop...

You might try the battery (will need to electronically reseal at a dealer in US) first. Hope it's that... but this sounds very familiar, in a bad sorta way.

The only time it's ever failed me...

Dan
2D