There is a bug in this keyboard. When you switch off the keyboard's lighting and restart the computer, the problem appears as follows. You must open the G Hub program and select one of the other backlight colors before the backlight will start working properly once more. I sent a letter to Logitech help (Application number: 5882426), videotaped everything, and they responded with standard advice like "update the program to the most recent version, reinstall, etc. These are simple solutions that don't resolve the issue. I returned the keyboard to the retailer while I awaited the outcome of the warranty repair. What about your quality, Logitech? A double click on the LMB sent two Logitech G102 mice to the keyboard.
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