Today I have a Super Nintendo Console that powers on but will not load any game I tested in it. So I am taking this apart to inspect it. Overall the outside looks clean, but as we know with electronics its whats inside that counts and upon immediately inspect its obvious there was some kind of liquid spilled into the 62 pin on this console that left a nasty brown stain and some corrosion on the connector and the PCB. This explains why the games won't load. It doesn't take that much corrosion to prevent an electronic from functioning properly and I think many would be surprised to learn how little corrosion you need to cause problems, especially with newer electronics. Fortunately these older consoles were built much heavier, thus making them easier to repair even with liquid damage.

More often than not with these older consoles, it is going to be corrosion or damage to the 62 pin that causes the console not to work. I have repaired hundreds of these over the years and I can count on 2 hands the consoles that had a bad component (like a bad capacitor), that was the reason the console didn't work. So usually the best thing to do is first test to see if the unit powers on. If it does you can inspect the 62Pin connector to see if there is damage or corrosion.

Note:There are 2 different version of the 62 Pin on the SNES Console.

-The first version, the 62 Pin pulls off the PCB and is 2 separate pieces. This version is easier to inspect/clean as well as replace so long as the part attached to the PCB doesn't need to be replaced. This version was on all launch consoles and consoles manufactured through 1992. See picture below for more details.


 
-The 2nd version of the 62pin found on newer (none-launch consoles) is 1 piece and you will not be able to pull it off the PCB. If you need to replace this version you will have to de-solder the original and solder a new one in place. 

See picture below for further details. As it displays the 62pin(outlined in BLUE BOX) used in later revisions of the console. Notice how the console is stamped 1995. Something else to note about these later versions of the SNES can be seen outlined in the RED BOX.This is where the original console had a separate audio board that had to plug into the SNES. These later models integrated the audio chip into the PCB and did away with this audio board.