Took a quick look and didn't see anything that stood out. Have you tried changing HDMI cables?
If you want to make the player region free (assuming it is currently not that way), this is the procedure:
As to the process of converting the Oppo to become a region free DVD player, its very easy and can be done in less than a minute. Then should you encounter DVDs with RCE, you use the same procedure to set the player back as a Region 1 DVD player.
http://www.dvdtalk.com/rce.html"Q: What is Regional Coding enhancement(RCE)?
A: It's a digital enhancement added to some Warner Bros and Columbia DVDs to stop region 1 (R1) DVDs from playing on Region-free DVD players.
Q: What's the difference between Region Coding and RCE?
A: Regional Coding enhancement(RCE) is an additional layer of protection which some studios have placed on select REGION 1 DVDs to prevent them from playing on region-free or multi-region players."
LGO says:
Procedure on converting the DV-980H
Conversion from Region 1 DVD Player to Region Free DVD Player
Press "Setup" on the remote control
Press "9210"
Press "0"
Press "Setup"
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To play back DVDs with RCE
Conversion from Region Free DVD Player to Region 1 DVD Player
Press "Setup" on the remote control
Press "9210"
Press "1"
Press "Setup"