G4 ADC display not powering on

I have a 400mhz AGP graphics G4 that at some point had a video card upgrade to a card with only VGA out. A friend recently gave me an Apple 15" Studio Display so I bought what I thought was a replacement for the original card, an AGP ATI Rage Pro 128 16mb. The card I bought has ADC and VGA out and when i connect the display it won't power on. The display will power on when connected to a G5 with ADC out and the VGA out on the card works on a VGA monitor so I believe both the card and the flat screen are working fine. Looking into it a little further I realize now that the stock card that was originally on the machine had DVI/VGA outputs. Is this where my problem lies?

Hi-
Looking into it a little further I realize now that the stock card that was originally on the machine had DVI/VGA outputs.
The Rev 1 AGP graphics G4 Sawtooth cannot support ADC, as there is no power provided to the ADC port via the AGP slot.
Is this where my problem lies?
Yes.
To use ADC monitors on a Sawtooth, you need a DVI port equipped card, and DVI to ADC adapter.
Power Mac G4: Display Compatibility

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