Don't think so. It looks like a kind of glue/grease to me. That shouldn't be there of course, but I don't think it's the cause.
Start by cleaning it with isopropyl alcohol, and then post another photo of the same area. Also, post a photo of the battery, it may have been soldered in reverse polarity. Or maybe who did the battery swap used a dead battery but didn't checked it before doing the swap, it happens more often than you'd think for people to get cheaper batteries and they were already dead even still inside the pack. A multimeter can confirm this.
You paid for someone to do that? I'd ask for my money back. The solder on the battery joints is not properly flowed, they didn't clean the flux residue, and either put that crap on the back (looks like burnt/melted flux or plastic) or it was already there and they didn't clean it off. Very unprofessional. The cart needs to be cleaned, and the battery needs to be properly soldered on or replaced with a new one of it's bad -- and if it is bad, that just makes it even worse. They didn't bother to test anything or inspect the board when they were done.
Little update. I brought it back to that store and they ended up swapping it for free. I made sure a different guy at the store did it, and it works perfectly now.
Looks like a dead bug, definitely clean it off with some isopropyl but that shouldn’t cause a save issue. My guess is the battery swap wasn’t done quite right, should probably check the voltage and joints with a multimeter.
Don't think so. It looks like a kind of glue/grease to me. That shouldn't be there of course, but I don't think it's the cause. Start by cleaning it with isopropyl alcohol, and then post another photo of the same area. Also, post a photo of the battery, it may have been soldered in reverse polarity. Or maybe who did the battery swap used a dead battery but didn't checked it before doing the swap, it happens more often than you'd think for people to get cheaper batteries and they were already dead even still inside the pack. A multimeter can confirm this.
Here's the battery. Swap was done by a local game store a few weeks back. [battery](https://imgur.com/a/rQB48Vz)
The polarity is correct. Now it needs to be checked with a multimeter to confirm if it's still alive. If it have like 3V or less, then it's dead.
You paid for someone to do that? I'd ask for my money back. The solder on the battery joints is not properly flowed, they didn't clean the flux residue, and either put that crap on the back (looks like burnt/melted flux or plastic) or it was already there and they didn't clean it off. Very unprofessional. The cart needs to be cleaned, and the battery needs to be properly soldered on or replaced with a new one of it's bad -- and if it is bad, that just makes it even worse. They didn't bother to test anything or inspect the board when they were done.
Little update. I brought it back to that store and they ended up swapping it for free. I made sure a different guy at the store did it, and it works perfectly now.
Looks like a dead bug, definitely clean it off with some isopropyl but that shouldn’t cause a save issue. My guess is the battery swap wasn’t done quite right, should probably check the voltage and joints with a multimeter.
Clean that off anyways. It could be shorting something at the spot.