[Sprite_tm] keeps coming up with nice work. This time he sent in his thinkpad style keyboard LED lighting solution for his toughbook. I know, you’re thinking… ‘it’s a LED…’ He used an ATtiny13 to ...

The problem might be with your keyboard. To verify this, connect another keyboard and observe the results. If the problem disappears, it might mean your keyboard is faulty or that its Caps Lock key ...