13" TV geometry and colour problems

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I wanted to correct a minor geometry distortion and colour balance
problem on my 13" Electrohome TV (I know, but I can't help it - I have
to tweak everything).

I was able to correct similar problems on my JVC and Samsung TVs by
using the service menu - does anyone know if there's a service menu on
this TV? I believe it's a generic made-in-China TV and seems to be
identical to Prima, Insignia, and possibly Toshiba.

Thanks!