Well I posted earlier about getting 4 NES consoles and a bunch other stuff to go with them but none came with any AC adapters. I managed to find an original power block that came with the NES 9v 1.3a but one of the prongs is loose so I think it's a bust. I then found another power block that isn't for a NES but it's output was 9v 850ma so I thought it might work because I've seen replacement blocks sold online with the same output.
Well after testing all four NES consoles with one or two games I'm getting the infamous blue flashing screen on 3 of them and a green flashing screen on the other. I don't know if the power blocks ampage being only 850ma might be the problem.
Then again these consoles and games are all pretty dirty so I was hoping someone here might have some experience with cleaning old NES consoles and games, or just electronics in general because if I do take them apart I would like to clean the PCB's as well and not just the connectors. Any info or tips are much appreciated as one of these NES consoles was my grandfathers and I would really like to get it working and would hate to mess it up.