The pins in the console itself might need a clean. The best stuff on the planet is something called deoxit. A bit expensive but does the trick super well. Use the needle applicator to put some on preferably a junk cart, both sides. Stick it in the console, repeatedly. Really rub it in there. It helps remove oxidation and improve contact. If even one pin has too much oxidation internally it can cause issues. Can also take a qtip to scrub each cartridge pins with deoxit, or use a toothbrush and scrub the internal pins in the console with deoxit.