Well.... yes... it was a relief...I mean I assumed from the begining that there are big chances not to be able to fix it.. but now I can see I had a great deal with it.
In order to replace the crystal you have to be a litle bit handy with soldering parts (it is soldered on the controller) and of course... you have to be able to identify it (it's a small metal piece).
Took me 30 min (opening the virus and closing it included) and you can imagine how happy I was when I started the Virus and on the screen appeared VIRUS INDIGO instead of VIRUS B.