Replaced HDD with SDD, installed Win 10 and now I can't even boot the BIOS screen.

[Jjamesss]

Hi, there! I hope you can help me with this, I don't know what else to do :(.

Base case: Laptop with default config: HDD + Win10 working perfectly. I wanted to add an SSD and install the OS there and keep the HDD for data storage.

I'll try to be short:

- Installed SSD + HDD, got Black Screen and couldn't even get the boot menu.. just LED backlight. Took out the SSD, everything normal. 

- Took out HDD and installed SDD again, got BIOS menu, it didn't recognize the USB stick with WIN10 installer.

- Disabled Safe Boot. Re-created the USB WIN10 installer to be GPT partitioned and be recognized by the UEFI boot option (there is no Legacy on the Boot menu).

- Installed Win10 perfectly on the SSD.

- Connected again the HDD (Win 10 installed there, nothing erased [maybe my bad here]). When starting the computer: Black Screen again.

- Disconnected SSD, booted WIN10 installer through the USB stick, formatted the HDD.

- Connected HDD+ SSD = Black screen.

Situation now:

- HDD + SSD = Black Screen.

- SSD = Black Screen. How? Why? How can I access the SSD now??

- HDD = Bios Screen.

+

When restarting with WIN key + B, The screen shows a text indicating the BIOS maybe corrupted and recomends re-installing it through a USB stick, downloading the latest one from an HP website.

Additional data: 

- Notebook: brand new HP 250 G7

- SSD: XPG SX6000 lite 128 GB

I'm willing to try anything. 

Thanks.

P.S: Images from the boot menu: https://drive.google.com/drive/folders/1C7rqm8nQ-NZkfNlUHEkySewSPvLVmdJG?usp=sharing

Update: Tried the SDD on another laptop and Win10 boots perfectly.

[Jjamesss]

Update:

• Updated BIOS to latest.
• Wiped clean HDD. Wiped clean SSD. Both using using diskpart method.

Still can't use the laptop with the SSD plugged in. There is no way I can turn on the computer with the SSD in and access even the BIOS, even less to access the bootable USB stick.
If I take it out, it works perfectly.