No bootable device problem Aspire5 a515-54G
My 9 month old Acer Aspire5 a515-54G with only HDD and W10 Home turned into a "brick" after I unplugged the power cord during booting (we had a brown out). When rebooting it went into "Repair mode" without any results, I then booted with my recovery usb drive and tried to restore from external backup drive that failed (won't boot, same Repair mode) I then restored the backup image file while reformatting the HDD with same result (won't boot). Finally still with usb recovery drive I reset (factory) that completely killed the UEFI partition I think as after that I get the "No bootable device" when booting. F2 still works but there is nothing listed under Boot Order.
Acer BIOS all have SATA set as RST-Optane by default that I changed to AHCI (also my recovery usb drive). I suspect that RESET (on HDD recovery partition) is RST-Optane compatible and corrupted the AHCI settings. I tried the default BIOS and sure enough it went to RST-Optane but still get the No bootable device message when trying to boot.
We live far away from an Acer shop or any PC repair shop, thinking of disconnecting the RTC CMOS battery and checking cable connections (HDD-Battery)? Any ideas what to do with a "brick?