Hello,
I was looking up teardown of this particular model and I can't see anywhere the above mentioned light.
If you can provide me the link where you found that it was glowing at some point there is always a way to fix by the way could be steep because of the age of the machine.
You can look up how hard it's even to open this thing up:
https://www.youtube.com/watch?v=j-w-3LZiYbA&t=886s