I have a ND board, but my large 21" NeXT monitor is no more. I'm curious what other monitors from back in the day might work with it, or if it's better to just get a 13W3 to VGA (or whatever) adapter at this point.
I have a number of Sun 13W3 monitors that are "period" correct as well as a couple versatile big VGA screens as well.
I'm using a NEC MultiSync EA-190M-BK 19" LCD with the NextDimension in my TurboCube, since my original 21" NeXT monitor also doesn't work anymore (see my other post:
http://www.nextcomputers.org/forums/index.php?topic=4917.0). It might not be "period correct" but I didn't want to waste a lot of space again for a bulky monitor, and since the LCD has both VGA and DVI inputs I can use it for other systems as well.
As far as I know any VGA monitor that supports "sync-on-green" and resolutions larger than 1024x768 should work using a 13W3 to VGA cable.
I'm using an NEC 1880SX flat panel, it's able to do sync on green and has a bunch of adjustments (including manually defining the resolution and stretch mode) that results in a fairly good picture.
Of course, a real CRT provides a better picture.
-J
NEC EA193Mi 19 inch VGA monitor (this model has the modern LED backlighting) works perfectly with dimension board no config changes necessary other than a 13w3 to VGA cable you can get here-
https://www.amazon.com/gp/product/B0C2MBSLB1/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1All switches off except sw6 on (sync on green) for the cable config switches.
I currently use an LG L1953T (1280x1024) that surprisingly supports sync-on-green. Unfortunately there are no scaling options, so a 4:3 image at lower resolution will be zoomed to the screen borders horizontally (producing some blur) with a black bar at the bottom.