For the noisy Samsung, you can open it up and poke around with a plastic alignment tool and see if you can see what's yelling. I wouldn't blame the FBT yet... I have seen loud noises from the yoke, and often the little choke that filters the AC line right where the line cord come into the board. If it's the yoke, wa2ise's toothpick idea is what to try. If it's the AC choke, you can replace it from another TV, or pour epoxy glue in it. If you can't find it at all, try wedging an eraser under the PC board. It's a mickey-mouse repair, but it sometimes works!
Charles