Maybe this?
https://smile.amazon.com/gp/product/B014I8UQJY/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
Just to update : this cable is working fine for my older 2690, but I did just order a displayport to dvi cable that I will attach to the new monitor. It has a display port out that I should be able to hook the 2690 to directly.
Trying this because I'm having some difficulty getting my lightroom library panel on the old monitor and getting the number 2 display to appear on the pa 271q without going through some acrobatics. With the library on the old monitor the 2 display automatically shows up on my laptop screen. Not what I want.
I have closed the lid to the laptop and then can get the 2 display on the new monitor. Or I can open the 2 display as a separate window on the new monitor. It's a little confusing right now. Just got the new monitor yesterday. Maybe it'll take a few days for me to work it out.
Still. The nec pa 271q seems good. I calibrated it to the same numbers as my old monitor. White point is a bit 'whiter'...i did the contrast to 250:1 but it calibrated to about 280. Seems ok. I may try 350:1 but not sure how that might affect what i see on my monitor to prints. Lots of stuff to try to see where I stand. 9 years ago I started with 250:1 for contrast because Sean Reid suggested it for his own use. But I think he was mainly doing b&w work on a nec 2490. That was a long time ago.
Ok. Andrew thanks for the help.
Morris
update 02/09/2018 : I tried the displayport out from the back of the PA 217Q to dvi port on my 2690. Nothing. Zip. Nada. The 2690 remains black screen. So I am living with it attached dvi to the hdmi port which works. Not sure why that doesn't work. The new monitor, 271q is displayport to the thunderbolt 2 port on my macbook pro. I thought that would work to power images via displayport out to the old monitor. I may try again. I tried first time to the dvi-i port of the 2690. May try the div-d port next time.
calibrating the monitors, changed the 2690 to the new monitor
WP ; d65
gamma ; 2.20
intensity ; 85
contrast ratio ; 350:1
color gamut ; native full
delta of 0.49 for the 271Q
0.38 for the 2690 monitor
The last 9 years i had the 2690 at 80 for intensity and a 250:1 contrast ratio. When I tried that on the 271Q the shadows were harsh and i think were showing metamerism in dark areas, shadows, of clothing mostly. The roll of clothing, dark colors in the shadows, had weird wrong colors and sharp shifts instead of smoother transitions.
Anyway. Now both monitors look good. the only difference, the older 2690 is a bit warmer overall, especially at the edges. The new monitor more neutral. This is very obvious in b&w images. Less so for color work.
The 2690 has been running a bit more than 15,841 hours.
You can imagine, the 271Q what, 60 hours maybe...
Just thought I'd update my experience for anyone who might be interested. thanks for help along the way...
m