JDM 99 silvia sat nav - xanavi cd player?

A blue screen of death has occured on my screen with two lines of japanese showing.

I tried putting in different cds but got the same message. When i put in a dvd which it shouldn't be able to read it pops up a different message.

No buttons can be pressed and about 10 minutes the unit tends to reset itself? turning off then on but still with the same message.

Anyone have any clue how to fix?