Taz 6 - Electrical Short Repair

I’ve got a TAZ 6 and I was pulling a piece of loose plastic from my extruder tip with metal pliers, lost my grip, and contacted something that sparked. Screen went blank.

Light on power switch turns on when activated
15 Amp fuse is undamaged
F2 and F3 Fuses replaced without fixing the problem

I tried to boot the control board with all the sensors/motors disconnected in case they were damaged and re-shorting the new fuses, but the board didn’t boot.

I Checked this page.
And it looks like the Rambo board is completely shorted out.

I think I’m going to have to replace the Rambo Board. Does anyone know a diagnostic check I can run to make sure I didn’t just fry the LCD screen or something similar before I replace the whole control board?

Unfortunately from your description this does sound like it will be an issue with the board itself. I have never seen the LCD screen go out instead of the RAMBo in a situation like this so it is very unlikely that the damage would be to your LCD screen.
Here is a link to our assembly guide for the Taz 6 control box to help you in installing the RAMBo: https://ohai.lulzbot.com/project/taz6-control-box-assembly/taz-6/
I generally recommend labeling the wiring harnesses before unplugging the old board just to help make plugging everything back in a little bit easier.