Parts of character sprites in game disappear regardless of game
I recently got a NES in that is able to load games, and play them normally. However, in all the games I have tested in the system, parts of the player's character sprite (whoever you are playing as), disappear. Using TMNT as a test game, the turtles at the beginning cutscene before you press start have this issue. If you plug a control in and actually play the game, parts of the player character will disappear and reappear depending on your controller input.
I've replaced the 72 Pin, and cleaned the dickens out of the pin pads on the main board, with no difference in symptoms. Any suggestions on other things I can try?
Also, is the loading of character sprites specific to one of the 72-Pin connector pins? So far, that is the only plausible theory I have about the issue.