retrofan_k, could you please describe for us, in as great of detail as possible, exactly how your brick happened? What I am looking for is as follows, or anything else I didn't think of:
Last game played
EmuNAND or not
Wifi on or off
Coming out of Sleep Mode, or booting into Gateway Mode in the first place
Which version of the Gateway Firmware you were running
Size/Brand of SD card in your 3DS, and perhaps in the Gateway Red Card
Accessed the eShop or any other online features using EmuNAND?
Previous flash cart usage (any flash cart)
I am thinking that there may be more common factors among those with a confirmed brick than we are seeing at first glance. If nothing else, perhaps the experience of bricked users can help others to try to prevent being bricked, themselves.
---- Last game played on OFW 4.5E firmware before GW exploit was The legend Of Zelda Ocarina of Time EU version
---- Emunand is N/A, see description of brick below
---- Wifi Was always off even on OFW 4.5
---- See brick description below
---- 2.02b that was previously downloaded from GW official download page
---- Will check SD brand and update later. From memory it was a generic brand that came with the 3DS, yet the MicroSD was a Kingston 8GB 4 Class.
---- N/A because the 3DS was never used online since 2xx OFW
---- N/A because no previous flash carts used
Exploited the console as instructed using the blue card and copied the 2.02b launcher.dat to the SD, as I have done this before on my other GW 3DS so its not something I haven't done before.
Gateway mode screen boots via holding L on profile, etc, which I then back-up nand. However, afterwards I had an issue with the red card seeing the games that I wrote to the microSD using the Win32 Disk Image tool because nothing would show up on the screen after selecting GW mode.
I then did a diagnostic check with the GW test rom and the all the tests passed except for the SD, as it was constantly flashing blue for like 20 mins, so I then took out the RED card and cancelled the test.
Turned off the 3DS, took out the microSD and wrote the new "Zelda between two worlds" Rom to the card. Booted into GW mode screen again and did another Diagnostic test and this time the SD passed, as did all the other tests (all Green OK).
Came out of that and then selected GW mode, which then it hung on a black screen with the power indicator still on for like 2 mins. I then decided to manually shut it down by holding the power button till the LED went out, which it did
The 3DS BRICKED upon restarting on a Blue Debug Screen (BSOD) after I turned it back on.
The 3Ds was never exploited whatsoever with anything previously and was just recently updated from 2xx OFW (cannot remember the exact number but it was 2xx something) using an original Luigi's mansion 2 to 4.5 E
Emunand was never selected or used nor any roms played, as I literately had the GW card for like 30-35 mins until it bricked my system.
Update: SD card is a Toshiba 2GB