Blc.My Orange 'nn' yellowing/brittle?
 

I need help brining my sisters orchid back to health. It is a BLC. My Orange "nn" It was doing fine in the spring even putting out a new shoot. But after about 3 inches of growth the shoot turned black and mushy and died. A few months later the leaves on the largest spike turned yellow and fell off leaving the cane to go brittle.
She had it in a SE window about 3 Feet or so away about 2 feet lower than the sill on a small table. It got good light here though it was coming though sheers.
She fertilized it every week with a watered down 1/2 rate orchid fertilizer by soaking the pot in a bowl for 10 mins.
Home temp is about 75-79 degrees F with some but not much nighttime fluctuation. I know they like this for flowers but We are just trying to bring it back to health for now.
Any help on care tips would be great.
to might light ?
to much or little water?
Should we repot it since its had time to adjust and its clearly not in a greenhouse so maybe drying fast? She would pull back on watering when she felt the medium was still damp. It is large chunk bark.
Should we stop fertilizing?
So many factors but it anyone has had expirence with this type of orchid and may have insight that would be great. I can also provide more info if needed.https://ibb.co/VHm0bDh
[IMG]<a href="https://ibb.co/VHm0bDh"><img src="https://i.ibb.co/VHm0bDh/71573276142-4-F246289-C840-4-A78-B443-8-D65-D673-BA10.jpg" alt="71573276142-4-F246289-C840-4-A78-B443-8-D65-D673-BA10" border="0"></a>[/IMG]

It’s not enough light. You put in in light appropriate for a phal and this plant wants more than that. Regardless of the other care it’s getting, if it’s not getting enough light it will slowly die over weeks or months.

Nothing to add on advice, right on. The plant is very likely Blc. Orange Nuggett --

thank you. I checked the roots and it doesn't have many so it was also under watered as the water was not going up to the top part of the medium where the roots where. We did a proper soaking and moved it to a better lit place.

New Cattleya shoots dying by turning black is almost always caused by not enough water, or not enough calcium. Your description of the plant makes it sound like not enough water.

After speaking with her and taking a look sure enough very poor root system that penetrate the top inch of the medium only. So it was barely if at all getting the water it needed! even when soaked it was not deep enough to get al the roots just the faintest part of the bottom. I should have known to check the rots first! we soaked it roots proper and put it back in the better lit area and will not disturb the roots again till spring after properly watering its roots.