Great guide. However, this guide did miss how to disassemble the game card reader which should be done before step 18 since the cartridge slot is blocking one of the screws of the fan. All that is required is to unscrew three (i think they're 3mm) screws and take out a little plastic black piece that was screwed in. Then, you have to pull out the ribbon closest to the fan. (This may take a bit of a hard tug to get out but it should be fine.) After that, the cartridge slot should only be connected via the other long horizontal ribbon to the left and you don't have to do anything because at this point you should be able to move around the cartridge slot and be able to unscrew the fan now. Sorry if this is a bit unclear because this is my first time doing anything like this but I thought I could try to help other people having problems.