orchid plant with no root
New to orchids. My 1st purchase (phalaenopsis) couple of months ago and plant was in flower. It did have a mealy bug which I am sure I have eliminated (familiar with them from my cactus collection) but am watching every day (haven't seen any for 4 weeks).
After I purchased I noticed during the new orchid soil transplant that the roots were dead or near so. Only a couple roots that came close to being ok.
Over last 2 weeks the 3 leafs have wilted and I am misting them everyday. 2nd stem has one flower getting ready to bloom but other 2 buds have turned a wilted yellow look.
Question: Is it possible for orchid to put out new roots and what if anything can I do to help.