The cache is not at the posted coordinates. The coordinates will bring you to a sign commemorating the main input device of the 2600 minus the “ick”. From this spot, use the cheat code*, ululululululululululLULululululululululululLULululululululululululLLulululu, to find the cache.
The Atari 2600 Video Computer System was a video game console released in October 1977 by Atari, Inc. It is credited with popularizing the use of microprocessor-based hardware and cartridges containing game code, instead of having non-microprocessor dedicated hardware with all games built in.
The 2600 was typically bundled with two joystick controllers, a conjoined pair of paddle controllers, and a cartridge game—initially Combat and later Pac-Man.
The Atari 2600 was wildly successful, and during much of the 1980s, "Atari" was a synonym for this model in mainstream media and, by extension, for video games in general.
* A cheat code is something the video game designers often put into the game that would disclose a hidden feature when applied. These "Easter Eggs" as they were often referred to where often accessed by an intricate series of inputs by the player.
This cache is part of RetiredGuy's Classic Video Game Series of caches: