STOKE-ON-TRENT, April 6 — The shelves lining Luke Malpass’s home workshop are a gamer’s treasure trove stretching back decades, with components of vintage Game Boys, Sega Mega Drives and Nintendos jostling for space and awaiting repair.

Parcels from gamers seeking help arrive from around the world at RetroSix, Malpass’s Aladdin’s cave.