Dashboard LED is out

Hi, I just noticed that one LED (indicating D gear) in the dashboard is out and the rest of LEDs are okay when I switch gear to D1, D2, Parking, or Reverse. I am wondering whether this is as simple as one broken LED or it's a sign of a bigger problem? If it's a broken LED, how can I get it replaced? Not sure whether the local auto parts shop even carries such parts...

Thanks,

XW