Greetings all,
I've been dealing with this same problem essentially since I got my Acer. There are two things have worked for me but first, there is NOTHING wrong with your drivers or HDD (regardless of what Acer says). I've found that it has to do with the connection between the mother board and the physical screen. I'm not a PC tech but I know enough to manage my way around hardware and this is what has worked for me:
Solution 1:
As stated by other users, perform a hard restart. Remove the battery and leave everything unplugged for a few seconds then only plug the laptop in (without battery). This has actually worked very well for me for many months however in recent times I had to do this multiple times before the video card would boot on start up.
Solution 2:
As stated above I do believe this has to do with the connection between the mother board and physical screen. Instead of opening the laptop screen to a full 90 degrees (completely upright) I leave the screen partially closed at or less than 45 degrees and press the start button.
Again, I am NOT a PC or laptop tech and this is purely anecdotal but for whatever reason this has worked very well for me. I don't want to discredit other suggestions such as checking your drivers and updating them but in my case none of that was the issue.
I hope this helps; this is a very frustrating problem and unfortunately Acer isn't very helpful.