one key doesnt have backlight and the others do

[panagiotistheodorou9]

one key of my keyboard doesnt have backlight (trust gxt 870) it is a mechanical keyboard whith white switches please help!!!!!!!!!

 

[hang-the-9]

Don't know what anyone on the internet can help you with, sounds like you have an LED out. Replace it or contact the vendor. You may have issues finding a replacement single key mechanism though unless it uses standard MX or similar switches.