Grey leaves on old Dendrobium nobile and damaged leaves on phalaenopsis

[jackiebrown]

Hello!
I'm new here and i'm from Italy

I'm trying to recover an old Dendrobium orchid, it's my mother-in-law plant that she never took care of (it stayed outside on the balcony in west exposure and i think she never repotted it ).
Probably tomorrow the bark order i made from amazon will be delivered, so i'm going to move the orchid in a larger pot with new bark.

I didn't check the roots yet but i noticed that there are a couple of stems with grey leaves, i'm not able to say if they're dead leaves or there's some kind of desease.

A couple of days ago i bought a phalaenopsis from a supermarket near here... the roots are ok, there are a couple of flours but i noticed that a couple of leaves were damaged; i cut them with disinfected scissors.
It seems there was a sun burn on them but i'm not sure of it, i post the pic of the cut leaf so you can see it and express your opinion

I hope the pictures link will work.
Thank you in advance and sorry for my bad english

Dendrobium and phalaenopsis pics