If you have the service manual and understand the electronics used, it's very likely that you can fix it. If you don't understand electronics, you probably won't be successful. The electronics involved are basic digital circuits, so you don't need to be a circuit designer to fix it, but you do have to understand how it works.
Rodgers is usually quite agreeable to providing service manuals for their organs. I suggest contacting them. They have most of these scanned, but the file sizes are bigger than most email servers allow. If you have a file drop-box service, that can work.
I have Rogers 820 with lighted drawknobs and if your 925 uses the same drawknobs than it may be much easier issue. If you open it you will see that on moving part is metal wire which touches 2 other wires to send off and on signals. It may be simply issue with bended wire, so it touched off wire as soon as you release it. I had similar problem.
I would be willing to bet what Rimokatolik said is the issue. I popped the top off the draw knob jamb, and the draw knobs use exactly the same mechanism that was described. What year is your 925? Mine is from around 1982-83. I do know that at some point, some of the newer ones had a different style draw knobs similar if not identical to what Rodgers uses in their current organs. The older ones use the "wire in the middle of two contact wires" mechanism.
That wire seems to be flimsy and one that would be easily bent or broken off. I would find the problem draw knob, and look at that wire. What stop knob is it?
Rodgers Oxford 925 built in 1983
Kimball K-800 Fascination - Sold
I don't know what year mine was built. It's the Spitz Principal 4' in the choir division. And some presets do have it activated in combination with other stops. The weird thing is when I press a general piston that has it and then turn off the stops one by one, it remains active but without the light. Pushing it doesn't turn it off, however, pulling it does turn the light on momentarily and then releasing it turns everything off!
The issue is fixed, I had to call the Rodgers tech. It was a bad transistor chip. Also, my CPU board had a VERY loose connection, which was causing all kinds of problems, including Grand Cipher!
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