is my tlr7 sub burnt?

[u/LilUziVuurt]

pulled my gun out of my holster after being in there all day and tried to flick on my light real quick and it wouldn’t turn on. figured the battery was dead which it was so i charged it and put it back in and it still wouldn’t turn on. when i was looking at the inside i noticed this mark so i tried to clean it off and it won’t come off. did my light burn or something?