I have this one for soo long now so I don't think that I added any friends.
Is it still possible to fix this? I have another working board which has other faults.
Did you ever friended yourself (the broken o3DS) to another 3DS system you own? If you did, that 2nd 3DS will have a record of the needed LFCS.
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Reviving that motherboard in a usable state where you can access GodMode9? Probably not. The battery reverse polarity mistaken may have already fried the ARM SoC and/or NAND chip. If either of those are dead, there's no chance of dumping your SysNAND *.bin image,
otp.bin,
movable.sed, and/or
essential.exefs. Without the dumped SysNAND *.bin image and possibly the
otp.bin (since your o3DS exhibited signs of A9LH custom firmware), retrieving the
movable.sed that's needed for
Nintendo 3DS folder decryption will be impossible.
In case your SoC and NAND chips are still alive, your best bet is to find someone locally around Germany or nearby European countries who has previous experience with
hardmod. You want someone who is competent in fine tip or micro-soldering. If you cannot find someone here on GBAtemp to do this, expand your search at other [ 3DS / Nintendo / video gaming ] communities such as the
Nintendo Homebrew discord channel,
reddit.com/r/3DS, and
r/3dshacks.
Please do NOT attempt the hardmod yourself. Because your handy work has been abysmal up to this point at fixing your 3DS, this repair method is beyond your ability to carry out successfully. I'm sorry if this assessment comes across as hurtful or a call to challenge, but I want you to have the highest chance in getting this right (by having someone else do this) as this is perhaps the last window of opportunity recovering those Animal Crossing saves with the condition your motherboard is in.
Because of your demonstrated persistence, I see in you a
competitive stubborn nature where being told this may be taken the wrong way. You have nothing to prove to anyone. As a matter of fact, you should be proud that you took the initiatives to try as not that many people could have done what you did in disassembling their own 3DS. There is no shame in outsourcing the repair to someone else.
Last warning: messing up a hardmod will kill the NAND. A dead NAND is a 'Game Over', which means forever saying good-bye to those saves.
