Predator Helios 300 PH315-55-795C won't start on battery, isn't charging

QuasarV
QuasarV Member Posts: 1 New User
edited August 2023 in Predator Laptops

I got my Predator Helios 300 (PH315-55-795C) about 6 weeks ago and in the last couple days it stopped charging and will not boot on battery power. It is stuck at 72% and says "72% available (plugged in)," not "plugged in, not charging." It works normally when it is plugged in. If I unplug the charger after it is turned on it shuts off immediately. Pressing the power button when it is unplugged does nothing.

After some research I have tried several fixes and none of them have worked so far:

  1. I disabled/enabled the ACPI battery drivers as well as uninstalled the drivers and restarted the computer.
  2. I attempted a battery calibration in the Acer Care Center but it did not seem like it was doing anything and just had a spinning wheel for a while before I cancelled it. I assume this is because the battery won't charge.
  3. I have tried several battery resets by turning it off, unplugging the charger, and holding the power button for 30-60 seconds and leaving it unplugged for at least 30 minutes. I noticed no change when I started it after this.
  4. I opened up the bottom panel and unplugged the battery for 60 seconds and plugged it back in. I noticed no change with this as well.

I ran a battery diagnostic and to my untrained eye it appears that the battery itself is exactly what you would expect from a new battery. I have attached the report as well as a screenshot of the battery charge so you can see how it has stayed at 72% for several days. I leave the laptop unplugged when it is off, so it's suspicious that it has not depleted at all in several days if it is not charging.

Any help is appreciated before I decide to send it in for service!

[Edited the thread to add model name to the title]

Answers

  • Puraw
    Puraw ACE, Member Posts: 13,042 Trailblazer
    edited August 2023

    Is your USB-C charger 90 Watt? a 45 Watt or lower USB charger won't be able to charge this Thunderbolt4 laptop. Make sure you use the correct USB-C port with the small Thunderbolt4 "lightning" sign for USB charging.

    No. 1: Disregard ACC, even better uninstall ACC, you don't need it and the battery limiting app interferes with MS ACPI battery protocol. You have to register one complete battery charge cycle in BIOS and Windows otherwise Windows battery stats will be inaccurate. I recommend you disconnect the battery again, but this time also reset BIOS by taking out the CMOS coin battery located under the main battery under a black plastic plate (round capsule with the red/black twisted wires), shorten the +/- contacts inside the CMOS capsule for a second with a bended paper clip, replace the coin battery with he + sign up, close the CMOS housing, check if the DDR4 modules are fully inserted in the RAM slots, reseat the DDR4 modules if necessary and press the Power Button on the keyboard 1 minute (don't toggle). reconnect the battery and plug-in the USB charger or power adapter that came with the laptop. Charge till the amber LED turns blue and boot, unplug the adapter/charger and use the laptop till it turns itself off (hibernate mode at 5% charge). plug-in adapter/charger and charge again till amber LED turns blue. That's it.