Controller not detected

Controller or memory card not detected

Symptom: A controller doesn't respond, an analog pad won't switch modes, or a memory card shows as unformatted, empty, or isn't seen at all. Sometimes one port works while the other doesn't.

Likely causes

• Dirty or corroded contacts inside the controller/memory card port.
• A worn port with loose pins that no longer grip the connector.
• A damaged controller cable or a failing memory card.
• After an internal install, a disturbed or unseated controller-port ribbon cable.

Fixes

1. Swap the device to the other port. If it works there, the original port is the problem; if it fails in both, suspect the device.
2. Test with a different known-good controller and memory card to isolate the fault.
3. Gently clean the port contacts with isopropyl alcohol on a swab and let them dry before reconnecting.
4. If you recently opened the console, reseat the controller-port board ribbon cable, which is easy to leave loose during reassembly.
5. Inspect the port pins for bending; carefully straighten any that are visibly out of line.