Oncidium yellow leaf spots gone crazy

[beachgirl]

This is an oncidium I've had for several years and mostly ignored until lately. It had been growing outdoors in a ceramic pot with holes in it being watered by south Florida rain. It seemed to thrive, and grow although it did not bloom again. I started paying some attention to it and because it was very tight in the pot decided to repot it. I almost divided it but decided to get a bigger pot instead and leave it alone. But now when I put it back it has developed yellow spots all over the leaves. Before they looked in very good shape with just a few small black dots on some leaves. The bulbs are full and not shriveled.
I am not sure what this is (fungus?) and what to do about it. Would appreciate some ideas! Also, how to get it to bloom! Thank you

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[Roberta]

I think I see quite a bit of what looks like sunburn. Did you put it in a much brighter spot? Also, this time of year the sun can increase abruptly... orchids that need more light can be moved into it gradually, but a sudden change can definitely toast leaves. (I have toasted more leaves in March than any other time...)

[beachgirl]

I had it indoors for a few days and when it started looking like this I put it back outside.

[SouthPark]

Assuming the leaves were green and unblemished when brought into the house .... then one possibility is fungal activity and/or bacterial activity. This could occur if there's not enough air movement. Definitely not 100% about the situation.

If the situation gets worse, then check the roots by unpotting .... and assess the media in the pot. And always have backup treatments for fungal and/or bacterial activity ... just in case.