Disconnecting built-in monitor - will external VGA allow higher resolution?

I want to connect an external monitor to an iMac 17" FP G4. I was told that if I disconnect the built-in monitor (on the logic board), then I can get more than 1024x768 on the external mini-VGA port. I'm hoping that someone in the forums has done this and can verify. I am thinking of getting a 20" external that supports 1680x1050. I was told by a service guy that this was a "little trick" you can do. By disconnecting the built-in monitor, then the machine assumes that the external is the primary monitor, and allows higher rez.
Thanks in advance

A few iMac G4 owners, whose computer display had some issue
decided to remove the attached chrome arm and LCD; and then
run solely a single external display. The results varied and some
were OK with the mechanical and software patch/hack/mods
they did to make the computer work that way. Of those, some
still had to do other things to get the external display's resolution
correct or to a more desired setting, some old patches for that
are available; and some users say they still work in the G4 iMac.
You could also try the 'screen span doctor' and also' switch resX'
both are free; and to some extent, both are sort of hacks... With
these, you may be able to experiment without removing the iMac
LCD display; since that is very invasive and may be a big mistake.
You can adjust the resolution for an additional display and also
with the other software that allows screen expand, not just mirror.
And the screen span doctor is an older software patch/hack
which came with a disclaimer. Some computers failed & others
appeared to work in the different screen mode. The original
expanded desktop patch was for iBook; then eMac and iMac G4.
These have been posted with links to the download sites in
the Discussions forums, and are still in the site, with disclaimer.
Good luck & happy computing!

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Message was edited by: earnerich

earnerich,
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