Homebrew Super Smash Bros. 3DS physical cart doesn't work

[BitMasterPlus]

I'm not sure what happened, but I can't get my physical copy of SSB4 3DS to work anymore. It started when I tried to install all the DLC's for the game just for fun, then when I went to start it, the title screen game animation is completely gone, and starting the game gives me a error and crash dump. I've deleted everything from updates to save files of the game from my 3DS and it still doesn't work. The error is like this:

arm11 core 1
exception type: undefined instruction
current process: loader 00000000000000000

I can upload and post the full crash dump if need be, which I think I should?

 

[N7Kopper]

The cart itself might be going bad. Apparently that's been happening. Back up your save - you might need to install the game to a physical SD Card.

 

[BitMasterPlus]

The cart itself might be going bad. Apparently that's been happening. Back up your save - you might need to install the game to a physical SD Card.

Really? Aw man, that means buying another copy would be a gamble if the cart doesn't work either. I might have to download it digitally.

 

[zfreeman]

Reflow the pins? Maybe the swath of carts not working is from cracked joints. Maybe the ROM chips aren't the problem; it's the solder.

 

[BitMasterPlus]

Reflow the pins? Maybe the swath of carts not working is from crack joints. Maybe the ROM chips aren't the problem; it's the solder.

That's unfortunately beyond my capabilities unless I can pay someone to do that for me.