So when you say you tried changing it out with another, do you mean that you put a known-good working bulb into the same socket and it also did not work? Or did you swap the bad bulb into another, working socket and it did not work there either?
In other words, did you try a good bulb in the high-beam indicator socket?
On another angle of the same subject, is this a colored bulb or just white? If colored, perhaps blue(?) then your high-beam indicator with it's red lens will illuminate purple. Now, maybe you want this
but if not, you might consider either getting a standard white LED or just put the regular old incandescent back in.
Good luck.
(or if you already got it fixed, what did the trick?)
Paul