Im stuck with black screen after booting. The keyboard lights and the front LED are on, nothing else.
Powering on the laptop with pressing D starts the display test and it works so it is not a display issue.
Let me explain how i got here.
I have been using the laptop with ubuntu 19.10 booting in legacy mode. After the newest update and a reboot i got only in minimal grub. I was trying to repair grub and switched from legacy to UEFI which got me to a black screen, keyboard lights on and a 4 beeps signal that kept on repeating.
Next i unplugged all peripherals and AC, opened the laptop removed the CMOS battery and the battery. Pressed the power button for 30sec, put everything back in order and tried to boot it. This time still black screen, keyboard lights on, but no beeping this time.
Next i tired to flash the BIOS, following the solution here:
https://www.dell.com/community/Laptops-General-Read-Only/firmware-issues-on-L322X/m-p/4204221#M765709
I can see that the laptop boots and starts to read the flash drive but then nothing happens and the white LED keeps on blinking still black screen.
Tied many many times to flash from the usb drive and waited for hours but nothing happens. The led on the usb flashes in the beginning while keyboard lights are on as well as the front indicator led. Then the light of the usb goes off and the indicator led on the front of the laptop flashes.
Is there another way to reset the NVRAM??
Any other ideas i could try? Apart from this the laptop has been stellar and would love to keep it.
Thanks.