Kodi2020 Can you post the image of your installation. Did you plugged the nand chip on the modchip. One of the nand connector on modchip goes to the nand connector on switch motherboard. Then there is another slot on modchip, where there is a light. You have to plug the nand chip there. Check your soldered connections also using multimeter and see if you get reading.
suspect: Check you soldered connection using multimeter set to test the connectivity or set to read 1k ohm. Also make sure, you plugged the nand chip properly as well.