How can I fix a HP Pavilion G7 that does not recognize a new battery or AC power adapter?

dwbilly August 28, 2012
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My HP Pavilion G7 does not recognize the AC adapter when connected after it exhausted the battery power. I have replaced both the battery and adapter with working ones but the problem still persists – what could be the cause, and how can I fix it?

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  1. Rajaa Chowdhury
    September 5, 2012 at 2:59 am

    I would ideally suggest not to mess with your HP G7 notebook and take it to HP Care.

    • dwbilly
      August 28, 2012 at 11:00 am

      ha14, hp's support page did not help a bit because not only does it not detect the battery but also the ac adapter, hence the machine does not power for you to try the troubleshooting options listed. Thanks anyways. Appreciate your help.

  2. Kannon Y
    August 28, 2012 at 7:44 am

    I'd guess there are one of two possible problems: Either an incompatible AC adapter or a damaged DC jack (which is soldered onto your motherboard).

    (1) It's possible that you are using a universal or cheap AC adapter that doesn't not fully meet the wattage specifications of the laptop. When an adapter under-supplies power, all manner of strange behavior occurs, frequently such as partial charging and other symptoms - where the laptop will not charge the battery, but it will run the laptop.

    The fix would be to get an adapter that's designed for the Pavilion G7. However, it sounds like you may have already taken this step.

    (2) The second likely problem is a broken DC Jack. Frequently, when friends or children trip over your plugged in laptop, they cause damage to the DC Jack. It oftentimes becomes detached (it's soldered on) from the motherboard and requires resoldering (which can be tricky). However, a damaged DC jack will almost always simply cause the laptop to stop charging entirely.

    Take a close look at the DC jack (the AC adapter plugs into this) on your laptop. Do you notice any bent pins. Or is it twisted slightly out of shape? If so, then you should consider taking it into a technician. It's a somewhat difficult repair unless you have soldering experience.

    • dwbilly
      August 28, 2012 at 10:39 am

      Kannon Y, thanks for your suggestions. As you rightly mentioned in your possibilities, the adapter was the one designed for the g7 and was shipped with it. Secondly, the DC jack has no bent pins, neither has it been twisted slightly out of shape. However, when the adapter is plugged in the laptop, there is this fuzzy noise on the motherboard which seems like the circuit is broken or short circuited as mentioned above by ferdinan Sitohang.

  3. ferdinan Sitohang
    August 28, 2012 at 3:23 am

    The problem of your laptop may be not lay on the battery or the adapter. The possibility is that your motherboard circuit is broken or having some short of circuit, the best way is by bring it to the customer service and ask for the checking only. So you can have a brief of what is happen with your laptop.

    • dwbilly
      August 28, 2012 at 11:05 am

      I think that the short of circuit will be the problem. What solution can be applied apart from the customer service checking stuff. Appreciate your response immensely.

      • ferdinan Sitohang
        August 29, 2012 at 2:55 am

        The best and secure way is by giving it to the customer service. Why? because they will check the whole part of your laptop and still they will wait any confirmation from you if there is any part need to replace. If you do it on your own, you need to know exactly which part of it need to replace and the type of the motherboard. As i know most of laptop original parts only distributed by their distributor and service center.

    • April Eum
      August 28, 2012 at 4:00 pm

      yes, it's probably the motherboard and how the ac adapter doesn't fit it, causing the exhaust.

      did you replace perhaps with hp battery/adapter or third party company?

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