Hello, I have sent a new 3DS XL to a guy to do a hardmod. The N3DS was basically new and I have successfully installed A9LH and Luma3DS following the instructions of Plailect's Guide (https://github.com/Plailect/Guide/wiki) before I sent it for hardmod. Unfortunately I didn't tell the guy doing the hardmod that A9LH was installed. So, after he installed the hardmod he tried to use it without the SD card inserted. And this didn't work like expected because of A9LH. The blue LED turns on and turns off immediately within a second and nothing else happens. He tried a few things like installing the main board into another N3DS just to check if the board has a problem and of course, it didn't work. Then he gave up thinking he had ruined the N3DS. After I told him all about A9LH he tried to use it again with the SD card inserted but to no avail. Even when the SD card is inserted when the N3DS is switched on the blue LED turns on and goes out immediately and nothing happens. He then did send it back to me. And now I have it with this condition. I checked the contents of the SD card and everything looks ok to me. The file arm9loaderhax.bin is present and all the other files are untouched. What can be the cause of the problem? What can I check?