Hello guys, I have a weird 3DS with me today. First off, please, allow me to say that I have done several of this before, that's why I've found this weird. I have a customer that bought two 3DS so I could swap their guts. It's a Gold Zelda bunble on 7.1 with Pokemon Y (he downloaded on that promotion) and Zelda ALBW, of course, and a normal red 3DS on 4.1. After the whole process I'll use n1ghty's emuNAND tool to pass the 7.1 NAND to the emuNAND on the new Gold with 4.1 NAND. It's simple despite the whole NAND, emuNAND I spit out here. Anyway... I swapped the motherboards successfully (now gold is on 4.1 and the red on 7.1) and soldered wires to the micro USB correctly. Tested continuity on the wires to catch shorts before soldering the wires to the motherboard, all fine. I connect the cable to the 3DS micro USB and PC, and a new drive letter appear, still all fine, BUT (I hate when a but appears), everytime I run Win32 Disk Imager, the letter disappear. So I shutdown (removing the battery or holding power for around 16 seconds) and when I turn the 3DS on without the cable the, the console fails to boot properly, either giving me a blue screen, black error screen or turns on properly but hungs (the upper screen doesn't show the option I selected bellow), and if I select enything, it freezes. All comes back to normal when I unsolder the wires from the motherboard. The cable is around 12cm long with something around 8cm for the internal 3DS wires from the motherboard to the micro USB female. So, it's something around 20-22cm long in total. I'm using a cheap chinese micro SD/SD to USB reader (the same one I used for every 3DS and X360 I've modded lately), and it's working. I even tested with MY 3DS XL to read, write and it's ok. I checked continuity on the wires I soldered to the motherboard, no shorts, everything looks normal. I'm gonna solder a cable directly to the motherboard to try to dump the NAND without the micro USB male/female. Let's see what happens. Meanwhile, any clues on what could be happening? PS: I have not posted any pictures because there's nothing wrong with it, honestly, it's all weird. No solder "drops", no tiny wires cut, I even clean everything with isopropyl alcohol after I solder, but if you guys want so see a picture, I can post. Thanks!