HP Pavilion 15-cs2093nl can't execute bios

[Puccj]

Hi everyone.

I have an HP pavilion 15-cs2093nl which get stuck before executing the BIOS.

This is the past history:

The computer used to fail to run windows (I got "boot device not found" error). Since I didn't have anything important in the computer, I was going to erase everything and re-install windows again. As usual, I create an USB stick with the media creation tool. However, at the moment of deleting the partitions in the computer in order to re-install windows, I got the error "0x800701" and the partitions couldn't be erased nor formatted. I tried both by installing windows 11 and windows 10.

So my idea was to install Ubuntu, delete the partitions from that and then install windows erasing Ubuntu. Yes, it's a twisted thing, but for me it was something easy and unharmful to do.

The installation of Ubuntu failed because it says there was only 4GB (not sufficient for the installation). Probably Ubuntu was seeing only the USB and not the real space on the computer. I remove the USB and start again the computer.

Now, when I turn the computer on, the caps lock light blink 5 slow times and 4 fast ones. I read here that this means that the embedded controller reaches its time limit waiting for the BIOS.

I tried everything listed here:

1. reset the embedded controller by removing the battery (yes, I opened the pc) and power supply and pressing the power button. I searched for a CMOS battery but searching online I realized that this computer doesn't have it.

2. reset the CMOS by holding Windows+V, pressing power button for 3 seconds, release the power button keeping Windows+V pressed. I got the message "CMOS checksum is invalid" etc, but still the computer got stuck with the 5+4 led flashes.

3. recover the BIOS by holding Windows+B etc. This time I got a message that says "BIOS recovery files couldn't be found, please plug bios recovery usb flash drive". So:

4. I created the usb flash drive using the instruction in the page, using the file under "BIOS-Firmware" I found in this page. The computer proceeds to run the BIOS update, it reboots and at the end a message appear (same stile as the CMOS checksum is invalid): "A BIOS recovery as been done".

However, the computer reboots and everything is the same as before, with caps lock blinking 5 long times + 4 short times.

Is that really a hardware problem? Because I'd found so strange that it all happen during a failed windows + linux installation. Was something (hardware) bad even before? What more can I do?

Thanks in advance.

P.s: I also tried to power the computer while holding ESC key, but the result is only that it get stuck with “ESC… pause startup” and with the usual 5+4 blinks.

[Rainbow23]

Hi @Puccj,

Welcome to HP Support Community. 
Thank you for posting your query, I will be glad to help you.

I see that you are facing booting issues with your HP pavilion 15-cs2093nl.

I suggest that you run an extensive system test by following the steps listed below:
1. Hold the power button for at least five seconds to turn off the computer.
2. Turn on the computer and immediately press Esc repeatedly, about once every second. 
3. When the menu appears, press the F2 key.
4. From the main menu, click System Test and then click on Extensive Test.
5. Click Run once.
You may also refer to this weblink https://support.hp.com/lt-en/document/ish_2854458-2733239-16 

Let me know if this helps.
Take care and have a nice 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!

[Puccj · Accepted solution]

I brought the computer for repair and it turned out that there is a damage on the mother board.

So there’s nothing to do apparently. It was an hardware problem.