There is some kind of video signal coming from the Amiga Video slot. When I connect it to my Samsung LCD the monitor displays a not ideal video popup. When I remove it I go back to no signal. So it can detect a signal but I would need a sync doubler to see what it is
The Acer was also a failure. All I got was a red weave pattern.
The Dell is a 3008WFP. I haven't tested it yet but found the specs
http://monitor.b4by.net/dell_3008wfp.htmlScan
Mines. horizontal frequency 30 kHz
Max. horizontal frequency 94 kHz
Mines. vertical frequency 56 Hz
Max. vertical frequency 86 Hz
Max. frequency 800 x 600 75 Hz
Max. frequency in 1024 x 768 75 Hz
Max. frequency in 1280 x 1024 75 Hz
Max. frequency 1600 x 1200 60 Hz
Since every number is greater than 15 not optimistic.