GBA SP cracked hinge: replacing the shell without breaking the ribbon

Crack, or something worse

A crack at the hinge is cosmetic until it is not. Once the lid loses its detent, the ribbon inside the hinge is being flexed every time the console is opened and closed, and it will eventually break. Audio that cuts out when the lid moves is the first sign that the ribbon is already damaged.

Check the battery door edge too. A hairline crack there lets the door flex, which makes the battery contact intermittent and produces a console that resets when you put it down.

Assessing the ribbon before disassembly

Test the ribbon electrically before you take the shell apart, because if the ribbon is already damaged you need to order a replacement at the same time as the shell. Open and close the lid slowly while running a game and listening for audio dropouts.

Look at the hinge barrel under a bright light. A white stress line across the plastic means the crack is through. A crack that has opened far enough to show the ribbon is a shell that should be replaced rather than glued.

1. Open and close the lid ten times while a game is running. Note any audio dropout, screen flicker or button that stops responding.
2. Inspect the hinge barrel from both sides under a bright light for white stress lines and open cracks.
3. Wiggle the lid gently fore and aft with the console open. Any play beyond a couple of millimetres means the hinge detent has failed.
4. Check the battery door and the battery contacts. Press the door while watching the power LED for a reset.
5. If there is any audio dropout, plan on a new ribbon as well as a new shell. Ordering both at once saves a second disassembly.

Shell swap without creasing the ribbon

Work slowly at the hinge. The ribbon has to be folded exactly the way it came out, and forcing it through the hinge barrel is how most shell swaps end with a dead speaker. Photograph the ribbon routing before you remove it, from two angles.

Do not glue a cracked hinge and return the console. Cyanoacrylate wicks into the hinge mechanism and locks the detent, and the repair will fail at the same place within months. A replacement shell costs little and the transfer takes under an hour.

1. Remove the six tri-wing screws from the bottom shell and the two under the battery door label.
2. Photograph the ribbon routing through the hinge from both sides before disconnecting anything.
3. Disconnect the ribbon at the main board end first, then free it from the hinge barrel.
4. Transfer the screen assembly, main board, buttons and speaker into the new shell. Keep the original screws paired with their holes.
5. Route the ribbon through the hinge with the same fold direction as the photograph, then connect the main board end last.
6. Test the console fully open and fully closed before fitting the last screws.