The K70 keyboard no longer works after the last update.

[drome82]

Along with the new hub firmware, the keyboard firmware was also released, but unfortunately the keyboard update stops before being completed, but then we warn you again about the mandatory update and so on.
Now the keyboard no longer works and the tab key and caps lock key continue to flash.

Edited April 22 by drome82

[ShaunaB1]

Quote

Along with the new hub firmware, the keyboard firmware was also released, but unfortunately the keyboard update stops before being completed, but then we warn you again about the mandatory update and so on. Can dog eat
Now the keyboard no longer works and the tab key and caps lock key continue to flash.

To fix your K70 keyboard that stopped working after an update, try resetting it. Turn it off, hold the ESC key, and turn it back on. If that doesn’t work, check for a BIOS switch on the keyboard and move it to a different position. If it’s still not working, you may need to get help from Corsair’s customer support. They can guide you further or provide a new firmware update.