Can you describe how you fix the 72 pin connector to get it working every time? I took mine out and cleaned it plus bent the pins up and I can get it to work but have to still fidget with it.
What works for me is to clean the games really well with a a tip and alcohol. Once you clean the pin connector, don’t forget to make sure the games are clean otherwise the connector will get dirty again.
I used the 1 up Console cleaner and the Cartridge cleaner. theres a bundle you can get for 29 dollars. My NES works pretty much first try for every game now, its awesome.