As far as I know, the D1 or D2 had a little nice green button up front, to change all the colors on the screen into an old school green scheme. I had both at one time.

Yes, that's the D1.  The D2 doesn't have that lovely feature.  Just wondering if anyone knows whether the D2 was an improvement in any way over the D1?  Perhaps some components were upgraded or the design was improved somehow to improve longevity?  (I have both, but I think my monitors may be taking up a little too much room here.)

The 1084S-Px models were made by Phillips while the 1084S-Dx models were made by Daewoo, they both used various tube manufacturers like Orion, Toshiba & Samsung...

The Dx part just refers to the different variations in the models sold, some had DIN connectors or SCART as the RGB input etc...

Not much difference in terms of the components used inside to be honest, the Toshiba & Samsung tubes are about the only thing to look for in terms of better quality (but not much)...

Best to keep the one that you consider yourself has the best picture and connectivity for your needs...

I believe that the 1084S-D1 could do PAL well (on an NTSC monitor anyway) but on the D2 it did not. (screen was not auto centered and was chopped off at the bottom)

The 1084s don't have "auto centering" any adjustments must be made by hand...

The only reason for the picture being chopped off would be the tube used itself, a PAL tube can display 625 lines while an NTSC tube can only display 525.

So while it's easy for a PAL tube to display a full NTSC picture an NTSC only tube will most likely crop the picture as it can only really display 525 lines unless the monitor contains some scaling circuitry...

I have owned many NTSC 1084S monitors and used many others at friend's houses.  They ALL displayed PAL pictures without chopping off the bottom if you adjusted the knobs correctly.  Some versions of 1084S do need more adjustment than others but in the end they all work with both PAL and NTSC modes.

And I agree that none of them have auto-centering technology.

Thanks for all the good info!

The 1084s don't have "auto centering" any adjustments must be made by hand...

The only reason for the picture being chopped off would be the tube used itself, a PAL tube can display 625 lines while an NTSC tube can only display 525.

So while it's easy for a PAL tube to display a full NTSC picture an NTSC only tube will most likely crop the picture as it can only really display 525 lines unless the monitor contains some scaling circuitry...

You are right about the auto centering, none have that.  I meant the verticle, it auto centered between NTSC and PAL.  Never had to touch the adjustments.  On the D2 I had to do that as it was severely chopped off at the bottom by like 3"!

Having owned two of them, I seem to remember the D2 having a digital signal capability, like CGA or something. I got familiar with the manual after the original 1084S went all whiny and blew a flyback transformer and I seem to remember something about that.