Please Bancs, read all of the threads and the very informative sticky that we have in the Orchid Forums, great information!! Particularly the one about starting out with Supermarket orchids-Phalaenopsis.
A spike gone dry and brown, can not come back! That's reviving dead tissue. Only the Lord can do that.
If you repotted these and have not seen new growth, fertilizer is NOT needed. Fertilizer supports new growth, it doesn't create it! Phalaenopsis and orchids are not heavy feeders! I have been growing for 45 years and yet I fertilize three times a year. No more.
When they are newly repotted they should be in low light, no sun, water so they never dry out! They typically show new roots within 4-6 weeks after repotting. Sometimes a little more. Patience.
I echo BBQ's assessment that these look pretty good. They will come around.
