Apple/Sony monitor: picture size smaller than usual

Hello!

I am having some troubles with my 20" ColorSync Apple monitor (which
seems to be in fact a Sony Trinitron monitor). When you first power it
up, image is about 15% smaller (both horizontal and vertical) than
usual. But it slowly 'grows' to normal size. It takes about 5 minutes to
reach correct size.

It seems to me as an HV problem. What do you think?

Thanks and best regards,

JOSE

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La Canyada - Valencia (SPAIN)

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