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My Roomba Discovery 4210 seems to be dead. Specifically, with or without a battery, and whether on the charging station or plugged directly into the charging unit, I see no lights on the display whatsoever. This unit has a history of killing batteries, but now seems like it is completely dead. I understand that the batteries themselves contain fuses; is there some way to bypass the battery (for now) to verify whether the unit itself is completely dead? I should also note that this is the second unit to exhibit this exact behavior, and both units were used in an environment with a high amount of dust and cat dander. Any thoughts from anyone?

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  • namxat Oct 03, 2010

    I have tried connecting the Roomba directly to the charger (i.e., plugging the adaptor in directly below the serial port cover) without a battery in the unit, but still do not see any lights on the display panel (the charger lights up, though). I will, however, attempt what you say overnight (a 24 hour charge, actually). So the Roomba has an internal battery in addition to the yellow battery unit then?

  • namxat Oct 06, 2010

    Okay, so I have two Roomba Discovery 4210 units, same symptoms on both. Per your instructions I removed the batteries from both and plugged both directly into the charger and the AC outlet and let both sit for 24 hours. After 24 hours the power button on both units was pulsing red. I then placed batteries in both units and let them charge directly from the charger for another 24 hours; both power buttons are still pulsing red. If I remove both units from the chargers the power buttons go dead; pressing them does nothing. Is this indicative of batteries that are completely dead, or is there something else going on?

  • namxat Oct 07, 2010

    It was good to have someone experienced to guide me.

  • namxat Oct 07, 2010

    It was good to have someone experienced to guide me.

  • namxat Nov 02, 2010

    Okay, I haven't had time to follow up on this, but I am still having difficulty. I purchased a new battery, swapped it in, and plugged the charger directly into the Roomba for 24 hours. After 24 hours I had green lights across the board, except for the power light (it was still pulsing red). I unplugged the charger and all lights went out. Hitting the power button (with the charger unplugged) did not power the unit back on. I don't doubt that the battery needed replacement, but it seems that there's a bit more going on here. Any thoughts or suggestions?

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Hello,

I will advice you remove the batteries from your Roomba Discovery 4210, after removing the batteries, plug the Roomba Discovery 4210 directly with the charger to an AC outlet, see if charges, if it does, it means the batteries are dead and will need to be replaced.

Take care.

Posted on Oct 03, 2010

  • Jimoh Adeleke Muyideen Oct 03, 2010

    Hello,

    Let me know the outcome after charging it.

  • Jimoh Adeleke Muyideen Oct 06, 2010

    Hello,
    The battery of your device is completely dead, you will need to get a new battery for your device.

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