I did a full 9h flight on sunday and all went well.
Today, I wanted to fly LJLJ-ENZV and still on the gate entering information to the FMC, I had the same issue others described in this thead.
I've entered data to the INIT page, set the overhead panel, IRS align and ATT etc just as I did in the first flight.
On the FPL page, I've clicked LJLJ, then chose RWY30 for departure and GIMIX1Z SID.
Then I clicked GIMIX and set as next waypoint "DCT/SIMBA", clicked the button and the left FMC I used went blank.
You still could see the green background lightning of the display but no letters and numbers anymore. (See screenshot)
I don't know wether or not the right FMC should be working, but I couldn't click anything in the F/Os FMC either.
On the overhead panel, all the buttons I've tested still worked.
I was not able to arm or extend spoilers anymore (not with SHIFT+#, nor by clicking it with the mouse).
Flaps worked pressing F7.
I was able to move the trim wheel by mouse but the trim indicator next to the wheel didn't move.
Then, something really strange happened: The airplane fell from like 50ft height sideways back to the ground (I didn't press slew, I swear! 😄)
The A310 remained on the GND for a couple second and then things went even wilder: it tilted around and moved around LJLJ in a lets say 10km radius with broken wings etc.
I was not able to record this on video, after a few minutes of circling and tilting on the ground, the sim CTDed.
Hope this was useful information.