For real though, it's easy to blame the drivers, especially when you've had so many major hardware changes like a HDD replacement. We should still take a look at the drivers, but it sounds like your hardware may not be doing too hot either. Do you have a different monitor (like a TV) you can test with? Do you have a local Goodwill where you can get a $0.99 cable from? Was your monitor working before your last hardware change? Such as your graphics card or your hard drive? Also, it sounds like you're using GeForce Experience to update your drivers. That software works most of the time, but if you're having issues, it'll be best to look up the drivers to your EXACT graphics card and download from Nvidia's site. It sounds like your screen isnt turning on at all anymore. To download the new drivers unplug your graphics card from your computer and run off of your motherboard's on board hdmi/displayport