The revenge phone

The phone brought in by my Tech is very weird. Its not because of the problem that the circuit for the microphone is faulty but the way it was damaged.

Boss: Well? How is it?
Me: There's nothing wrong with the handset. I'm suspecting the circuit board

After opening the phone, we see the rust.

Boss: Maybe the servant wants revenge
Me: How so? This is water damage
Boss: Maybe the servant mopped too often
Me: Unlikely. The bottom connectors did not have signs of water damage
Boss: Maybe the servant poured water on it.
Me: Possible but it more of a few drops. Besides, if it was a lot, the keypads would show.
Boss: .........
Me: I just try to repair, OK?

And so, the water reacted with the circuit board
from the top.

And the bottom too. If there was a lot of water,
the mark would have been more.

It was so bad that the legs of this LED
had rusted through

And here it is, the full damage. Funny how rust can
do this. I suspect, maybe there is a component that
had rusted and "exploded" onto its surroundings
But I do not have the same phone model to compare

As soon as I repaired the LED, the second LED
(on the right) also had its legs rusted through