Since my hdd can't be detected by my bios, I can't use my laptop, which is an Aspire E15. The hard disk seems to be spinning so it could be still functioning. I've had this problem 3 months ago and I fixed it in just 5 hours, but I can't remember what I did in order to fix it. I've tried changing the boot mode from UEFI to Legacy, but nothing happens after that. After the Acer screen shows up, the "No bootable device" screen shows up. I don't want to go outside for someone to repair this for me knowing that I have fixed this problem already.