I am quite sure you will get banned if you are not using your own GameCard certificate, but you will need a modded switch to get your cert. But let's see how it will go...
I changed from flex cable to backside mosfet installation which works fine. Just in case I will ruin the cap near the mosfet on an OLED. Can anyone help me what cap it is that I can order some spare sparts ?
Maybe you can post some pics of the installation ? that could help - but even if the reading is consistent it could be a problem e.g. if the adapter is touching the wrong solder point - and an course double check that you have wired the cables to the chip in the right order.