I recently bought (Secondary Market) a Blackwidow Chroma V2 and there is a problem with the 'N' key. As you can see, it does not match the RGB pattern of the rest
Amazon.com: Razer BlackWidow TE Chroma v2 TKL Tenkeyless Mechanical Gaming Keyboard: Green Key Switches, Tactile & Clicky, Chroma RGB Lighting, Magnetic Wrist Rest, Programmable Macros, Classic Black : Video Games
4 Ways to Clean a Razer Blackwidow Keyboard - wikiHow