Power button, charging light and caps lock blinking

[Bobro1]

When I plug in the charger on the laptop, the charging light,the caps lock and power button do not stop blinking 

[Anand_Andy]

Hi @Bobro1,

Welcome to the HP Support Community

I'd like to help!

I understand that you are facing a blinking light issue with your HP Notebook. Not to worry I will help you to get a resolution to resolve the issue.

To assist you better I would require more information regarding this:

• Did any hardware changes take place on the laptop recently?
• Is the power cord connected directly to a working wall outlet?

Meanwhile, I recommend you perform the following steps to isolate the issue and arrive at a fix: 

Step 1: Hard reset 

• Power off the laptop.
• Disconnected AC adapter from the laptop.
• Press and hold the power button for 15 seconds.
• Reconnect the battery and plug the AC adapter.
• Power ON the laptop and check.

Step 2: Recovering the BIOS

• Turn off the computer, and then connect the power cord.
• Press and hold the Windows key and the B key at the same time, and then press and hold the Power button for 2 to 3 seconds.

• Release the Power button but continue pressing the Windows and B keys. You might hear a series of beeps.
• If the HP BIOS Update screen does not display, repeat the previous steps but press the Windows key and the V key. If the screen still does not display, your computer might not support the feature or there is a hard drive issue. Continue to the next section to Recover the BIOS using a USB recovery drive.
• If the Power light turns off, the Power button was held too long. Repeat the previous steps, making sure to hold the Power button for only 2 to 3 seconds.
• If a BIOS recovery message repeatedly displays, continue to the next section to Recover the BIOS using a USB recovery drive.
• If a message that the computer improperly shut down or a boot problem is detected displays, follow the on-screen instructions to resolve the error.
• If Windows starts, update to the latest BIOS version. Go to HP Notebook PCs - Updating the BIOS for more information.
• The HP BIOS Update screen displays and the recovery begins automatically.

You may also refer to the steps mentioned in this document: HP Notebook PCs - Computer beeps or a light blinks during startup

Hope this helps! Keep me posted. 

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!

[ZG220]

I had a similar issue recently which others may be facing.

Short version: Try replacing your laptop battery.

Long version: I replaced the battery in my HP Omen 15-ax011np laptop two years ago and I recently started receiving warnings about the battery not holding a charge.

I ignored these messages as my laptop is always plugged in anyway.

One day, the laptop suddenly wouldn't boot to Windows. It would turn on, the fans would start spinning but all I would see is a black screen and the CAPS lock flashing slowly 5 times and then quickly 3 times.

I opened up the laptop, cleaned the fans, cleaned the old thermal paste on the CPU and GPU, reapplied fresh thermal paste, unplugged the hard drives, the memory, but nothing worked.

I tried replacing the CMOS battery (the coin shaped one) but could not find one despite the manual indicating one existed.

I read an online post that said modern laptops no longer use a dedicated CMOS battery but rather use the main battery.

Given the CMOS battery is essential for the BIOS settings to be retained and for the system to boot up, my last resort was to replace the main battery.

This time, it turned on but complained there was no operating system.

I recalled that when I set up the laptop I had used legacy boot rather than UEFI but the BIOS settings had now been reset to defaults so I just needed to enable legacy boot in the BIOS and the laptop booted to Windows and I haven't had an issue since.

I hope this helps someone else to avoid more unnecessary landfill waste.

[RicardoEngineer]

I have the same problem.

I have checked the CMOS voltage, it's just 3.00 V, so it's okay.

These steps haven't worked on my HP Zbook 14.

Any other option, please?