New 3ds not turning on after battery polarity changed

[itsalemh]

My problem started after putting the battery in backwards (positive pole with the negative). I had the console disassembled because I was trying to fix another problem and accidentally put the battery in the wrong polarity and then it wouldn't turn on. I have already tested the two fuses that I found in the mainboard, the one next to the charging port and the other next to battery contacts (I don't know if there are more than two) and they both have continuity.

The console charges the battery, because when I connect it, the charging indicator LED turns on. When I disconnect the charger, the charging LED stays on until I remove the battery. When I try to turn on the console, it doesn't give any sign of life, not even LED indicators. I would like to know if there is way to approach the problem or because I don't want to mess it up even more. I have also tried cleaning the connectors.

 

[KleinesSinchen]

First of all: I don't know a solution. Nintendo went cheap and didn't install a diode as protection against wrong polarity. A split second is enough to fry something.

We have had that issue before. I don't remember any solution ever showed up. You can try a different powerboard.

 

[redunka]

This thread should have some useful information:
https://gbatemp.net/threads/new-3ds-xl-fuse.416208/
I haven't read the whole thing thoroughly, but I think that people in there had some success in fixing that issue (if I recall correctly, it involved replacing one of daughter boards and probably something else).

 

[itsalemh]

Thanks a lot, it seems to be a very useful information is incredible that you can't find this type of info in other sites. Again thanks a lot

 

[gamefan128]

Change the polarity back.