Cymbidium: virus or mites

[An_DS]

I have this Cymbidium hybrrid for a couple of years now. It bloomed only once, I seperated it into 2 plants last year. They have been outside (shade) during the summer. No signs of bloom, just growth. Both plants have the same symptoms (my other Cymbidiums don't): new leaves: light green marks, becoming yellowish. It did suffer from mealy bugs last year.
Could this be caused by mites? Should I think about a virus?
The last picture is of another Cym, with some blackish spots, anyy info on this is also wanted!
Thanks