If everything looks fine, then lighting problems can often be solved by rebooting your computer, unplugging the keyboard, and plugging it back in after your PC restarts. If this doesn’t work ...

See: Keyboard Key Stuck; Computer keeps typing the same letter ... She loves finding solutions for day-to-day tech problems.

If this doesn't fix the problem, try the next solution ... connect a different keyboard that works fine on another computer to confirm hardware damage as the cause. While you're waiting for ...

Computer keyboard is already enabled in BIOS by default ... Helping his friends and relatives fix their PC problems is his favorite pastime.