No ID dendrobium

[LFC25]

This is a no ID dendrobium just finished flowering. I waited till new roots and new shoot growth then I repotted it to S/H.

Few questions here:

1. The new roots (next to the new shoot) were green in color before repotted. After repotted, it became brownish and also look soft. Are the new roots already dead?



2. These are old roots. Are they also dead?



3. These are old stems and have been this way for the past 3 months. Are they also dead or they will grow again?



Sorry for the many questions as this is the first dendrobium I got.