How to Replace a Game Boy Worm Light Bulb

By Retro vGames | Published: 2026-10-28

Category: How-to Guides

Learn how to safely replace the bulb in your Nintendo Game Boy Worm Light with this step-by-step guide. Extend the life of your retro handheld accessory.

Quick answer

Replace the bulb in your Game Boy Worm Light by carefully opening the casing, removing the old bulb, and soldering in a compatible 5V incandescent or LED replacement.

Why replace instead of buy new?

Original Nintendo Game Boy Worm Lights are increasingly hard to find in working condition. A used unit may have a dim or burnt-out bulb, but the flexible neck and connector are often still fine. Replacing just the bulb saves money and keeps an authentic accessory in your retro setup.

Step-by-step bulb replacement

1. Open the Worm Light casing: Use a small Phillips-head screwdriver to remove the two screws on the back of the light housing. Gently pry the two halves apart with a plastic spudger or fingernail. The bulb is held in a small socket inside. Common mistake: forcing the halves apart can crack the plastic. Work slowly around the seam.
2. Remove the old bulb: Grip the bulb gently with needle-nose pliers and pull it straight out of the socket. If it's stuck, wiggle it slightly. Do not twist, as the socket leads are fragile. Checkpoint: if the bulb base breaks off, use tweezers to remove the remaining metal from the socket.
3. Prepare the replacement bulb: Use a 5V incandescent bulb (e.g., #14 or #16 grain-of-wheat bulb) or a compatible LED with built-in resistor. Trim the leads to about 1/4 inch if needed. Common mistake: using an LED without a resistor will blow the LED or damage the Game Boy's link port.
4. Solder the new bulb: Insert the leads into the socket holes. Solder each lead to the metal contact inside the socket. Ensure no solder bridges between the two contacts. Checkpoint: test the bulb by plugging the Worm Light into a powered-on Game Boy before closing the casing.
5. Close and test: Snap the casing halves back together and reinsert the screws. Plug the Worm Light into your Game Boy's link port. Turn on the console and check that the light illuminates evenly. Common mistake: overtightening screws can strip the plastic threads. Tighten just until snug.

What you need

Nintendo Game boy Worm Light: The Nintendo Game Boy Worm Light is a used accessory that may show signs of wear like scratches or scuffs. If you're repairing a used Worm Light, the plastic casing and connector may already have minor cosmetic damage, so take extra care when opening it to avoid cracking the shell.
Nintendo Game boy Worm Light