Hello, I'm a newbie and enjoy tinkering with electronics. I have no training, just endless ambition. I do have a basic understanding of electronics and have built small projects, including stepper driver (kit) and various emulators from back in the dtv days..and mod chips in game consoles. so I can kinda read schematics, solder and use a multimeter.
I have a broken steam link ,made by valve, that I purchased from eBay. I can't find a schematic but I think I've narrowed down my problem to this component but there are no markings on it. It is the square thing left of the red dot. It's just up from the 5vdc power port. It has 4 soldered legs on the bottom and a bar symbol on the top.
Any help would be greatly appreciated!