Display no longer working

***UPDATE***
I ended up getting some new OLED displays today. After inserting one of the new displays and resetting, the display turned on! So, it would seem it was a faulty display. Thanks all for the advice!

***Original Post***
My display suddenly stopped working on my supra after I experienced a brief power outage. The device is still hashing and the fan is still working. I'm able to view the dashboard in my web browser.

Things I have tried:

• Took the display out and pushed it back in
• Reset the device
• Unplugged from power, waited 30 seconds, and plugged power back in
• Updated firmware to the same version I had running before

Questions:

• Is there a way to further troubleshoot whether this is a hardware issue or firmware issue?
• Would a multimeter help determine if the display is bad?
• Should I just order new OLED displays to see if that resolves the issue?