Acer Predator PH16-71 - Won't start up unless connected to mains power, the battery is 80% charged.

StevieK
StevieK Member Posts: 3 New User
edited 9:31AM in Predator Laptops

Hi,

New here. Very recently purchased a brand new PH16-71 and loving it…but. I've noticed that unless the laptop is connected to mains power it will not start from an off state (i.e. fully shut down).

The battery is 80% charged and once the unit is powered up I can disconnect mains so I know the battery is good.

I've searched the forums and come up with a couple of suggestions but none seem to help. I'd like some confidence that this is "correct behavior" as I'm travelling to Europe with the laptop shortly and although I've got an extended 4-year warranty I need to know its working.

Thanks

Steve

[Edited the topic title to include the topic issue.]

Answers

  • Puraw
    Puraw ACE, Member Posts: 13,527 Trailblazer
    https://community.acer.com/en/discussion/716712/acer-predator-ph16-71-wont-start-up-unless-connected-to-mains-power-the-battery-is-80-charged

    Hi Steve, this is not normal behavior, use the 330W power adapter provided with this laptop and not a USB-C charger. If you have Acer Care Center or AcerSense running disable these 2 services in Windows Services: accSVc, acsSvc and accAgentSvc, change the Startup type to disabled and click on Apply. In Windows uninstall these 2 battery drivers:

    Battery drivers.jpg

    and in BIOS disable the 3 USB and Wake from S4 (ignore the red box on the picture):

    BIOS.jpeg

    Reboot to Windows and see if the battery will charge to 100%. If still the same problem, run a battery report with the command prompt: powercfg /batteryreport check if Connected Standby is supported and if the last full charged capacity is close to the design capacity. If you can't charge the battery to 100% there may be a power rail problem or bad plug/socket, and you should take the laptop to Acer Services in your country to check this.

  • StevieK
    StevieK Member Posts: 3 New User

    H,

    Many thanks for your response.

    1. 330W charger has been used throughout and is currently connected.
    2. I've disabled the Acer Care Center and Acer Sense drivers (accSVc, acsSvc and accAgentSvc). Restarted. Behaviour remains.
    3. I've uninstalled the two battery drivers. Restarted. Behaviour remains.
    4. I've disabled the settings in the BIOS. Saved and restarted. Behaviour remains.
    5. Battery refuses to charge beyond 80%. Laptop still refuses to start without connection to 330W charger.
    6. Battery report indicates Connected Standby to be NOT SUPPORTED.
    7. Battery cycle count is =3.
      battery-report.zip

    I've attached the output from the Battery Report for completion. Any further suggestions welcome. I guess it's gonna be a Return to Acer job…… 🤬

  • StevieK
    StevieK Member Posts: 3 New User

    On point 3, I notice that these two Battery Drivers do re-add themselves.

    image.png

    This is after I de-installed them and restarted.

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