If you go into diags (keep tapping F2 when you turn the laptop on) and run the HDD tests, does it pass/fail the tests? or does it say 'no hdd installed'?
Sounds like either hdd (32GB eMMC) has been totally wiped so there's not even a partition on it, or the system is no longer detecting the hdd. Legacy/UEFI settings in BIOS could also do this, but sounds like you've already tried that.
The eMMC storage in this laptop is soldered to the mainboard, so a faulty 'hdd' requires an entire motherboard replacement.
Try the diags and let me know what it says.