Hi Timberwolf, unfortunately the advice I received was insufficient.
After some investigating/trial and error on my own I found the issue was due to an out of date graphics driver for my Nvidia card (driver update had been released no more than 24-48 hours prior to encountering issue, and I'd ignored prompts to update). For some reason this would prevent the HD cable from sending a signal to my TV/monitor upon startup. If you're able to use a VGA cable instead of HD, that worked for me. Once the driver is updated, HD will work again however this issue may rear its head down the line.
To try and prevent this, now when I notice a new driver for my graphics card has been released I update it right away. To completely prevent this issue...