The laptop i am using is HP Probook 4530s Config Intel Core i3 (2nd Gen) 2310M / 2.1 GHz 3GB RAM 320 HDD
I am trying install ubuntu server 18.04 on it. But after successful installation it wont boot,it shows
Boot Device Not Found Please install an operating system on harddisk. Hard Disk - 3F0
Thinking that its a HDD/Installation problem i installed i windows 7 and it worked perfectly fine.To test i installed (dual boot) Ubuntu 18.04(Not server) and now i can dual boot windows and Ubuntu.
After all this steps i installed Ubuntu Server again it wont detect the partitions, but as a single drive (i can partition of-course ) but the old drives are not showing there. So i install it again, but it wont BOOT, same error message.
I tried searching but didn't find anything , that's why i am posting here. Any help is appreciated, Thanks in advance.
NB: I also tried booting live and run boot-repair but it didn't fix.