try running it with one monitor and see if you are having the same problems. what is the full model number of the hp?
HP Pavilion
AMD Phenom II X4
Windows 10 Pro
120GB SSD & 1TB HDD
GTX 750ti
3 Extended Monitors
I had been using my desktop flawlessly for about 2 years. A week ago, my desktop started acting a little strange. Some times it boots up just fine, and some other times I can see the power-light on, fans spinning, graphics card fan spinning, optical drive pops out, etc. but it's not showing the BIOS splash screen or booting into windows. It does that whenever it wants. If I turn on the PC, there's a 50/50 percent chance that it will boot up just fine; on the other hand, the components might power on but the PC won't boot into windows. Once it powers on though, I can use my computer for as long as I want without it shutting down on me, or causing me any problems; however, when it doesn't boot up I can spend hours trying to get it to boot up. Has anyone had a similar problem. The components are all turning on inside the PC; I've even reseated the RAM modules and graphics card. I'm really lost here.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic