{"product_id":"nintendo-gameboy-test-cartridge-world-class-service-cart","title":"Game Boy World Class Service Test Cartridge – Screen, Sound \u0026 Button Diagnostics | GB","description":"\u003cp\u003eGame Boy World Class Service Cart – Diagnose Your Hardware Like Nintendo's Own Technicians\u003c\/p\u003e\n\u003cp\u003eNintendo's authorized service centers didn't guess when a Game Boy came in for repair — they tested it. The World Class Service Cart is the diagnostic tool they used: a purpose-built cartridge that runs a structured series of hardware tests to identify exactly what's wrong with a unit. Originally exclusive to Nintendo's repair infrastructure, it's now one of the most sought-after utility cartridges in the Game Boy collector community.\u003c\/p\u003e\n\u003cp\u003eThis reproduction brings that same diagnostic toolkit to your hands. Whether you're troubleshooting a vintage DMG, checking a Game Boy Color you picked up at a flea market, or verifying a freshly recapped unit after repair, this cartridge tells you precisely what's working and what isn't — no guesswork required.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Diagnostic Tests Included:\u003c\/li\u003e\n\u003cli\u003eScreen Test — check for dead pixels, lines, and display issues\u003c\/li\u003e\n\u003cli\u003eButton Test — verify every button registers correctly\u003c\/li\u003e\n\u003cli\u003eSound Test — confirm both speakers and audio output are functioning\u003c\/li\u003e\n\u003cli\u003eScroll Test — detect screen tearing and display timing problems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAn essential tool for any Game Boy collector, restorer, or repair enthusiast.\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003e🎮 Compatible with: Game Boy Color · Game Boy Advance · GBA SP\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003e✅ Available in 8 shell colors: Gray, Red, Blue, Yellow, Black, Clear Blue, Green, Gold\u003c\/li\u003e\u003c\/ul\u003e","brand":"Onlygameboy","offers":[{"title":"GREY","offer_id":53863928791369,"sku":null,"price":17.0,"currency_code":"EUR","in_stock":true},{"title":"BLACK","offer_id":53863928824137,"sku":null,"price":17.0,"currency_code":"EUR","in_stock":true},{"title":"RED","offer_id":53863928856905,"sku":null,"price":17.0,"currency_code":"EUR","in_stock":true},{"title":"BLUE","offer_id":53863928889673,"sku":null,"price":17.0,"currency_code":"EUR","in_stock":true},{"title":"GREEN","offer_id":53863928922441,"sku":null,"price":17.0,"currency_code":"EUR","in_stock":true},{"title":"YELLOW","offer_id":53863928955209,"sku":null,"price":17.0,"currency_code":"EUR","in_stock":true},{"title":"CLEAR BLUE","offer_id":53863928987977,"sku":null,"price":17.0,"currency_code":"EUR","in_stock":true},{"title":"GOLD","offer_id":53863929020745,"sku":null,"price":17.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0998\/7181\/8057\/files\/IMG_20210528_112414.jpg?v=1771189044","url":"https:\/\/onlygameboy.myshopify.com\/products\/nintendo-gameboy-test-cartridge-world-class-service-cart","provider":"Onlygameboy","version":"1.0","type":"link"}