Acer 4755g blue screen, hdd can't be read.

hi guys. i have a acer aspire 4755g just bought it a couple of months ago. this just happened to me today. i tend to unplug my laptop during sleep in order to stop the charging process. this morning when im ready to use my laptop. i plugged it in and it was all fine, i even got to reach to the desktop. when suddenly. all the desktop icons disappeared, and my laptop got into a freeze and the blue screen pop up.

i thought it would just be fine. so i decided to reboot it. but the rebooting takes a while. so i knew there was a problem. so i waited. when suddenly. it said that no operating system was found.

so i entered bios. and found out that my hdd is not being read by my laptop. does that mean my hdd was broken? or was it just a hardware that needs to be fixed? please help.