Screen Blacks out, says to "Check HDMI-IN Cable"?

[aessa]

I've had this computer for about 4-5 months, and when I'm in the middle of a video game, the screen would black out and say "Check HDMI-in Cable". Sometimes this happens 2-6 times while I'm playing (I would unplug the power cord, and plug it back in to restart the computer and get back in the game, but it would crash again soon), other times it doesn't happen at all (which is really rare though). Last time it worked fine, was before my video game said I was missing "VCRUNCHTIME140_1.dlll", which I reinstalled soon after to play the game again. I do not have an HDMI-IN cable connected from my computer to a TV or anything. Please help me fix this inconvenience. 

[WAWood]

@aessa 

Let me start out with a couple of observations ...

First, the All-in-Ones are not gamer PCs; instead, they are basically oversized laptops -- with all the deficits of laptops and none of the advantages.  And, GAMER laptops start a $1000 USD (for an entry model) and quickly go up from there.  So basically, your gaming experience with an All-in-One is likely to be poor, at best.

Second, whenever you run into file errors like the ones you are seeing, that indicates a corrupted Windows file system -- and the most common cause of that is a failing drive.

So, let's check that first, because if it is failing, it would need to be replaced and there is no point then in doing anything else until we confirm that.

If your PC is new enough to support UEFI, you can use these steps to test the hard drive: http://support.hp.com/us-en/document/c00439024

If not, to check the drive you have to follow these steps:
1) Press Esc key repeatedly, several times a second, while rebooting the laptop. Do NOT hold the key down, just press it over and over.
2) Eventually, you will see an HP Startup Menu
3) Press the Function key for testing the hard drive (usually F2) and let it run.
If the drive checks out OK, then report that and I can provide you options for reinstalling Windows on your PC.

[aessa]

Hey there,

I've ran a test on the Hard Drive and everything checks out, it passed. Would I still need to reinstall Windows? And if I do, would I lose all my files, downloads, etc?