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It's real easy to fix, just bridge it.
when I bridged my psp backlight fuse, I used a little piece of wire, but I think if you want, solder would work fine as well
It sounds like a blown fuse. Make sure ALL of the connectors, especially the screens, are plugged in all the way. If that doesn't fix it then it looks like a blown fuse and you'll need to bridge it. Wait for someone else to come along and post a pic of where they are. Or search. Or google.