Turn it on, and keep it on. Specs don't matter if you bricked it by turning off during an update!
Do you have access to the load media of the OS? You may need to re-install. If you turn it on, and after it has "faded to black", you just lightly press the power button, does it immediately turn off, or does it shut down gracefully?
If it shuts down immediatly, then no OS is loading, and you will need to re-install. If it takes 3 or 4 minutes to shut down, then the OS is still doing its thing, and leave it alone next time you boot it up!