Hi
@Urbanshadow , so sorry to hear that, you can try this.
-Reformat you microSD to FAT32 and 32kb of cluster (Yes, again)
-Use the last Frimware and Kernel from the official EZ-Flash web (Firmware 4 & Kernel 1.04e), copy only the Frimware and Kernel files to your microSD
-If you can, pair it with a fast microSD card (class 10)
-Use batteries in good shape
-If asked, DON'T set the "autosave" to tilted (At least NEVER if the "SAVER" folder is not created yet by the system, this can lead to enter into a loop)
-For now, DON'T try to configure the RTC or autosave, we just want to get to run the "Update_FW4.gb" update (in this case to downgrade)
If by a miracle you were able to boot to the menu, flash this Firmware "Update_FW4.gb".
(When flashing, never press any button, when it finishes, turn off/on the system)
If none of this is working, you can try the same steps, but with Firmware & Kernel "FW5K105RC.zip" from the comment #405 and try to flash the "Update_FW5_7-31.gb"
If you still the same after all, you can also try to remove the battery (ONLY IF YOU KNOW WHAT YOU'RE DOING) and after a couple of minutes put it back and try again the steps above
Notes:
-When everything is prepared, try to boot several times to try to get to the Flash card menu
-Use every Update file with it's respective "ezgb.dat", even if they have the same size, they are different
(
UPDATE: You can use the ezgb.dat from "FW5K105RC.zip" and "Update_FW4.gb" from Offical web)
-When finish updating, power off/on the system, never use the reset button of the cartridge for this particular task
I hope something of this helps you, and if not, let's wait for the EZ-Flash team to see if they can help with this issue. Cheers mate
And
@Urbanshadow just for the record, What is your test system? it has any mod?