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try to reuse UF8/9 if at all possible?
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Don't remove them until we see what the data from them looks like with UE7 / UE8 removed from the video databus. If it springs to life, you may not need to remove or replace them at all.
If you do eventually remove them you'll be removing them because we have reasonable grounds to believe they are faulty. Removing them in one piece would enable you to test them independently using an Arduino sketch or some other kind of tester for that purpose so you can definitely say that they are or are not faulty, but it's up to you decide whether that is important to you.
Cutting them up in the usual way is certainly less likely to damage the board than trying to get them out intact.