Mini-DVI to DVI, DVI to VGA and No video on Samsung SyncMaster LCD

External monitor works fine on a PC with same adapter (minus the Mini-DVI to DVI). OSX recognizes the external monitor and even gives display options in system preferences, and the mouse moves off the main display into the extended display but external LCD sits in sleep mode, but must detect some sort of video signal because when i pull the cable i get the "No Video Detected" warning on the external monitor. Could OSX be sending a sleep signal to the external display? I checked all the Energy Saver prefs? Any other thoughts?
Late 2006 20" iMac
OSX 10.5
250 GB HD
1 GB Ram

Malcolm Rayfield wrote:
The mini-DVI to DVI adapter may not be passing the analog video needed for VGA.
Apple's mini-DVI to DVI adapter DOES NOT pass analog VGA signals.
For some inexplicable reason, Apple chose to use a digital-only DVI-D
connector. The analog video signals (pins C1 thru C4 in the drawing
below) are not connected.
http://en.wikipedia.org/wiki/DVI
The DDC channel and 'hot plug detect' signals are connected, so
the IMac and monitor can "see" each other -- but there's no path
for the analog video.
...nuthin' in TheRuleBook sez it has to make sense,
Looby

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    Message was edited by: BlakeTron
    Message was edited by: BlakeTron

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