caps lock blinking 3/5 after bios update

[Ermen]

After a bios update (F.24 Rev.A), my laptop wont start. Black screen, caps lock blinking (3 long, 5 short).

I tried the win + b (and win+v) trick, but it wont work. I cant boot to usb key in order to restore bios.

A soon as I plug the power cable, it autostarts (but nothing occurs except the blinking).

Do you think I can do anything about it?

[WAWood]

@Ermen 

Software failures will generate on-screen messages, usually about not finding an Operating System or not being able to boot. When the screen is blank, the PC is experiencing a major hardware failure.
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If the CapsLock key is blinking or there is beeping, read this HP information on the likely cause of the hardware failure based on the blinking or beeping patters.

For laptops, this HP thread describes the different blink and beep codes: https://support.hp.com/us-en/document/c01732674?jumpid=reg_r1002_usen_c-001_title_r0001
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To determine the cause with hardware failures, you have to be able run diagnostics. We have no way of accessing your PC from here, so we can not do that for you. You have to do it yourself.

You do this by pressing the Esc key repeatedly when rebooting and then, when the HP Startup Menu appears, selecting Diagnostics (usually F2) and letting it run.

If it is NOT possible to run diagnostics, or if that does not work, then there is NOTHING more you can do by yourself -- and there is NOTHING we can do because we have no way of accessing your PC from here to run diagnostics or repair hardware.

You will need to have the PC physically examined in a service facility by folks that can run their own diagnostics to determine what is wrong with it.

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If your PC is still under the original one-year HP warranty, or if you have purchased an extended warranty from HP and this is still valid, then having HP do this is an inexpensive option for you. In that case, you should contact HP Customer Support to see about having it repaired or replaced under warranty.

Here is how you can get in touch with support:
Step 1. Here is the link: http://www.hp.com/contacthp/
Step 2. Select the product type.
Step 3. Enter the serial number of your device or select let HP detect your product option.
Step 4. Select the country from the drop-down.
Step 5. You should see the HP phone support number or Chat option listed.

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If your PC is no longer under warranty, then it will cost you up front to have HP examine your PC. If you want to do that, you will have to contact an HP Repair or Service Center to see if they can examine the PC to determine the cause(s) of the problems, if it can be repaired, and an estimate of the repair costs.

Since you live outside the U.S., here is a link to HP Service Centers, by Country/Region: https://support.hp.com/in-en/service-center

If you don't get useful results using the Service Center link, here is the main HP link:

https://support.hp.com/us-en/contact-hp?openCLC=true

If you can't get assistance from HP, then you will have to seek out a local laptop service facility to have them examine it for you.

Good Luck

[Ermen]

Thanks for your answer.

I know it's detected as hardware failure, but it happened right after a bios update. I launched the app under Windows, then it autorebooted but the screen never went back, no BIOS message, nothing but the blink. I can't see how an aborted BIOS update could destroy my CPU nor my MB (it's the meaning of the 3.5 blinking).

The laptop is bricked and the warranty is over. In your experience, is it useful to get it repaired or will it exceed the price of this relatively cheap laptop?

[WAWood]

@Ermen 

That really depends on what it takes to get it working again.

We have no access to your PC, so there is no way we can assist with reverting the BIOS.  You would have to go to the HP product page for your PC, download an older BIOS version (if it is available) and save that file. You would then need to read the material below about creating a BIOS update boot USB stick:

This is an indirect method for creating a BIOS update boot USB stick -- which comes in useful if you can not boot your PC into Windows and you need to do a BIOS update.

Macrium Reflect (MR) is a free tool that can be used to image and restore PCs, but it also has an option to create Rescue Media (is disk or USB form) that can then be used to Repair your PC.

It is available from here: http://www.macrium.com/reflectfree.aspx

What I recommend is the following:
1) Download and install Macrium Reflect (MR)
2) Use the option to create a boot USB stick
3) Open File Explorer to point to the USB stick
4) Create a folder on the USB stick named Apps
5) Download the HP BIOS Update file (this is a self-extracting archive file)
6) Copy the HP BIOS Update file to the Apps folder on the USB stick

NOW, you have a bootable USB stick that also contains the HP BIOS update file

Boot your original PC from the USB stick. It will take a few minutes, so you have to be patient. Could be 3 MINUTES or longer -- it's slow.

The USB stick is designed to repair Windows problems, but you don't want to do that. So, when you get to the app, down at the bottom-left of the screen are three icons. The right-most is a file manager -- click that to open it. Then, find the HP BIOS Update file and double-click that. That will start the BIOS update process.

When it is done, remove the USB stick and reboot your original PC.

If that works to restore the older BIOS and that also works, you have a working PC again.

If that does not work, then you would need to take it to a laptop repair facility, along with the BIOS update files, and see if they can do anything for you.  If they can't, using the HP files, you should then see if they have another way to update the BIOS chip. You will need to find out how much they will charge you for that.

If you have to end up having them remove and replace the BIOS chip, that could cost more than simply replacing the laptop.