Laptop won't boot unless plugged in, battery 100%

[MWS254]

Laptop won't boot up unless it is plugged in and the battery is 100%.  After boot up unplugging the power supply the system still continues to run. Also seems to be having problem with the clock keeping accurate time.

Have tried unplugging and doing a hard reboot but no changes.

Any response is appreciated,

[Raj_05]

Hi @MWS254,

Welcome to HP Support Community.

Thank you for posting your query, I will be glad to help you.

It sounds like there might be a few issues with your HP laptop. Here are some steps you can take to troubleshoot and potentially resolve the problems.

1. Battery Issue:

   • It's possible that your laptop's battery is not holding a charge properly. You can check the battery health in Windows by doing the following:
     • Right-click on the battery icon in the system tray (bottom-right corner).
     • Select "Power Options."
     • Under your current power plan, click "Change plan settings."
     • Click "Change advanced power settings."
     • Expand the "Battery" option and check the "Battery health" to see if it's reporting any issues.
   • If the battery health is poor, you may need to replace the battery.

2. Power Settings:

   • Make sure that your power settings are configured correctly. You can do this by going to "Power & sleep settings" and ensuring that the laptop is not set to hibernate when unplugged.

3. Clock Accuracy:

   • An inaccurate system clock may be a result of a CMOS battery issue. The CMOS battery is responsible for maintaining the laptop's hardware clock. If it's depleted or damaged, it can lead to timekeeping problems. You might need to replace the CMOS battery.

4. BIOS/UEFI Settings:

   • Access your laptop's BIOS/UEFI settings and check if there are any power-related options or settings affecting battery usage. Ensure that everything is set to default or optimized settings.

5. Driver and Software Updates:

   • Ensure that your laptop's operating system, drivers, and BIOS/UEFI firmware are up to date. Outdated software can cause various issues.

6. Hardware Diagnostics:

   • HP laptops often come with built-in diagnostics tools. You can run these tests to check for any hardware issues. Access the diagnostics by turning off your laptop, then turning it back on and repeatedly pressing the appropriate key (often F2 or F12) during startup. Look for options like "HP PC Hardware Diagnostics."

7. Operating System Troubleshooting:

   • You can perform a system restore to a point when your laptop was functioning correctly. This might help if the issue is software-related.

I hope this helps.

Take care and have a good day.

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Click the “Kudos/Thumbs Up" on the bottom right to say “Thanks” for helping!

Alden4
HP Support 

[MWS254]

Right clicked on battery icon and while it does not have the option of advanced settings options all the battery tests I have run have come up good. I have run HP PC Hardware Diagnostics Window and the test system accessed through restart and pressing F2.

I do not see that hibernate is an option in my settings so I reset to default which is if I recall basically sleeps after 3 minutes.

By looking at included computer manual I don't think this laptop has an accessible cmos battery.

I have also been running into a CMOS checksum is invalid error CMOS reset (502).

When I run the HP PC Hardware Diagnostics Windows it shows BIOS System firmware update  has passed.

I usually let my laptop run down a little and then shut it down, wait a few hours and try to reboot. 

Regards.