"Stuck pixels" are typically the result of a bad transister in the LCD matrix. Pixels change from light to dark based on polarization of the individual pixel. Apply electricity, it polarizes one way, remove electricity, it depolarizes, changing shade. If you take away the electricity, the pixel won't stay "stuck." (This is oversimplified, I realize, but it's basically accurate.)

A dead white pixel means it isn't getting polarized. A dead black pixel means the transistor won't shut off, and keeps the pixel polarized. Switching back and forth isn't going to repair a bad transistor. There's no mechanical switch that's going to break loose if you just push and pull on it enough times.

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