The battery LED flashes continuously (5 times long)

[RaminJM]

The notebook generally works. However, the battery LED flashes continuously (5 times long). Continuously means that it does so even when the notebook is turned off, whether the power adapter is connected or not.

That certainly shouldn't be the case. What's wrong with the notebook?

HP Pavilion 15-cs2535ng

[A_Gayathri]

Hi @RaminJM,

Welcome to The HP Support Community.  

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

I understand you are getting the 5 long flashes on the battery LED of your HP Pavilion 15-cs2535ng could indicate a battery-related issue, possibly one of the following:
 

Let's try the below Troubleshoots steps. 

1.    Turn off the Unit.

2.    Disconnect the AC adapter.

3.    Remove any discs from the disc drive.

4.    Remove memory cards from the card reader slot.

5.    Disconnect all nonessential peripheral devices, such as printers, scanners, external hard drives, and USB flash drives.

6.    Disconnect the AC adapter press and hold the power button for approximately 15 seconds.

7.    Reconnect the AC adapter, and then turn on the computer.

Step 2

Turn off the unit and please press and hold the Windows key + letter B key and the power button together for 30 seconds after 30 seconds, 1st release the power button but keep holding the Windows key and B key for ten more seconds and then release these two keys If done correctly, you will see the display flashing once. Please attempt it thrice as this step and Restart the unit

Step3

The unit has to be turned off, Press Win+ V while holding these two keys then Press the Power button, continue to hold all three keys for 30 seconds and then release the Power button first and then release these two keys Please attempt it thrice  and then you may get a Pop-Up CMOS Check and it will restart the unit 

Even if you don't get a Pop-up restart the unit manually after 3 attempts.
Let's try reinstalling the Microsoft ACPI-Compliant Control Method Battery 

1) In the search box, type, and open “Device Manager”. 

2) Expand “Batteries”. 

3) Right-click the "Microsoft ACPI-Compliant Control Method Battery" that is listed there. 

4) Click on “Uninstall”. 

5) At the prompt put a check in the box to remove the current driver 

6) Shut down the computer. 

7) Remove the battery for a minute and then put it back in. 

😎 When the computer comes back up it should automatically find the driver. 

9) Go to Device Manager. 

10) Expand Batteries. 

11) Right-click the "Microsoft ACPI-Compliant Control Method Battery" that is listed there. 

12) Click "Search automatically for updated driver software". Do the same thing with Microsoft ACPI-Compliant Embedded Controller. 

Let us try Battery Calibration,
 

Please charge your computer for 100% and disconnect the charger and continue working on it till the battery drains completely to 0% then connect the charger and  once the unit is charged  100% then check 
 

• Battery Malfunction or Failure: If the battery itself is failing or has malfunctioned, it might trigger an LED pattern even when the laptop is off. This can happen if the battery has degraded significantly or has developed a fault.
• Firmware or BIOS Issue: Sometimes, an outdated or corrupted BIOS can cause irregular LED flashing or issues with battery status reporting.
• Motherboard or Charging Circuit Issue: There may be a problem with the charging circuitry on the motherboard, which could cause the system to misinterpret battery status, leading to unusual LED behavior.
   
• Run HP Diagnostics: While your laptop is powered on, you can run the HP Hardware Diagnostics tool by pressing Esc repeatedly as you start the laptop, then selecting F2. Choose the Battery Test to see if any specific issue is detected. HP PCs - Testing for hardware failures
• Update the BIOS: Check HP’s support site for your model to see if there is an updated BIOS version. Sometimes, battery and charging issues are addressed in BIOS updates.
• Consider Battery Replacement: If the diagnostics show the battery is degraded or faulty, a replacement may resolve the issue.

Refer to this document: HP Pavilion 15-cs2535ng User manual

HP Notebook PCs - Using and troubleshooting the AC adapter
HP Notebook PCs - Battery light turns on and off while battery is charging
 

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.