Quoted from PinMonk:What batteries are in there now really doesn't say anything. It's what was in there before that may have leaked at some point in the past and not been cleaned up properly, and the traces are finally starting to fail from the corrosion. It's very common. The factory reset not working is weird, and makes me think that.
I would highly recommend never using alkaline batteries...in anything.
This is a little concerning ... could be nothing, but looks like corrosion to me.
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Anderson, SC
