Roadhog left screen black

The left screen on my Roadhog displays some of the startup info, but when startup gets to the flying hogs, it stops working. I have an external monitor and am able to start it up, but the left built-in touchscreen never does. I've read from other posts that this could be due to a dead bios battery which I will replace, but I would like to check the bios settings and make sure they are correct after swapping the battery. Do you have a link to the recommended bios settings?
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