twitchy data slider on yamaha dx11

[squatski]

This problem has suddenly decided to appear after me replacing the back-light. It's making editing things a total nightmare! so say if you're editing a name, the letters glitch from A.B.C very fast, and it's like that on all things so once you get to editing operator frequencies, I just can't be doing it! lol. Any idea what's up? not tried anything yet apart from moving the slide hard and fast up and down. Pretty sure I put all the main board connectors in ok too.

[Rasputin]

Wild guess, but check how the cables are routed around CN5 and CN6. There's probably interference from the backlight being passed from the wires on CN6 into CN5. Either that, or you messed up a ground somewhere during disassembly or reassembly.