Hello Nutello84, because they have use different Hardware that means that you must now which COntroller (for exam. AK1025) with which Display driver must be implement into the Firmware, the Firmware will implement the Base Software and the special Software driver for the Display and the other HW, so it is necessary to now which PCB you have. But i think one way is to Clone or read out your current Firmware, after them you can flash a other SW and if they not work you can flash back the "original" sw which you have safe / clone !
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