Hi @ladybug78 ,
Did the BIOS show the HDD was there?
If so have you got a Win 10 recovery USB drive?
If not, you can create one from any known working Win 10 computer. All you need is a 8GB USB flashdrive and 40-60 minutes of time.
In the host computer, go to Control panel > Recovery > Create a recovery drive and follow the prompts.
Once you have the recovery drive, you need to change the boot order in your laptop to boot from the USB drive first.
Insert the USB drive into the laptop and start the laptop. Press Esc then F9 when the laptop first starts to change the boot order.
Once the laptop boots from the Recovery drive into the Windows Recovery Environment menu , select Troubleshooting > Advanced > Startup repair and follow the prompts.
Do not select Reset this PC as this will erase all your data and reinstall Windows.