Bug Keyboard light "Black widow CHROMA"

Hi (first, sorry for my english,) I have a problem whit the light of my keyboard. I bought this keyboard second hand. And, at first it worked perfectly. But for some time I have had a problem with the lights. Some (many even) don't make the right colors anymore. I tried to repair by deleting all my profiles on Synapse, I tested by uninstalling the application. It's no use... Impossible for me to have a keyboard with the same color everywhere. I share somes picture. First pic when i chose orange light Second pic when i chose pink light and third pic when i chose blue light (you dont see on the picture, but somes key are, (for no reason) in pulsation mode .(alt- R -4 - X )