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Back to TV: There are two variants of PAL (imaginatively named PAL A and PAL B).

PAL A is used in Europe (most notably in the UK, I believe), while PAL B is widely used in South East Asia, Australia, and probably a few other places I don't know about.

While I'm not sure of precise differences, I'm pretty sure, that PAL A sets won't work in a PAL B system (and vice versa).