• Entire Di2 packed in this evening while on the turbo. A couple of weeks ago, all shifting stopped, no lights on the junction box, and it wouldn't charge. No yellow charge light on charger either. I swapped some cables around as one didn't feel like it was clicking in properly, and boom, started working again and charging

    This evening, nothing. Can't get it to charge, have swapped cables again, but it's totally dead. I'm assuming the charger is working as it charged everything up last time, and the system died while in use

    Dead battery? It's easily 4 years old

  • Best way to test is to plug into the computer with the charger and see if you have any errors.

    If nothing, it might be the battery is dead in which case you'll need the PCE-1 to confirm.

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