Hi Zos, Thanks for responding. As I mentioned in an earlier message, the problem has been resolved. The mini display port to display port cable that Dell provides won’t work with the iMac 27 Retina 5K, but Apple’s thunderbolt cable works, providing a USB cable is used to link the Dell monitor to the iMac. Took a lot of experimentation to figure that out. Dell doesn’t provide any Mac support whatsoever. I don’t know why the USB cable is necessary. Perhaps it powers some component of the monitor.
In any case, the Dell P2715Q working now as my second monitor. It differs in operation from the second monitor I was using previously — a 2010 iMac in target mode. The old iMac had half the pixels as the 5K version, and when a doc was moved to the old iMac screen, it would rescale it and show it at the same size it was displayed on the 5K. In other words, if I was displaying a photo at 100% on the 5K monitor and moved it over to the old iMac monitor, it would automatically show it at 50%. The Dell on the other hand, displays the same doc or image proportionately larger.. The 5K is 5120 by 2880, where the Dell is 3840 by 2160, so the same image or doc is shown on the Dell as about 30% larger. That works for me since I use it for my mail list while writing and for my tools while photoshopping. With both monitors calibrated to the same specs, the Retina 5K is slightly more saturated and a wee bit warmer, but they’re a good match overall. I suspect that since it’s 4K, the Dell will be great for watching 4K video. And with it’s less vibrant image, it gives me an opportunity to see how some of my photos might look on systems other than an Apple Retina. Paul > On Jul 8, 2016, at 12:17 PM, Zos Xavius <[email protected]> wrote: > > Have you tried plugging it into the port that is working? You need to rule > out if the monitor is good or not. > On Jul 7, 2016 9:29 PM, "Bruce Walker" <[email protected]> wrote: > >> Does the monitor have multiple selectable input sources? My old Dell >> had four inputs and only lights up when you select a live input with >> video on it. >> >> >> On Thu, Jul 7, 2016 at 8:00 PM, Paul Stenquist <[email protected]> >> wrote: >>> I bought a Dell P2715Q monitor to use as a second monitor with malate >> 2015 iMac 27 Retina 5K. It’s a 4K monitor with great reviews. But I can’t >> get it to light up. I’ve tried running it off a mini display port to mini >> display port (thunderbolt) cable. No good. I’ve tried the mini display port >> to display port cable that comes with the monitor. No good. There has to be >> a way to do this. Others are using the same monitor. Dell tech support is >> clueless. Anyone here have a suggestion? I suppose the monitor could be >> defective, but that seems unlikely. >>> >>> Best >>> Paul >>> -- >>> PDML Pentax-Discuss Mail List >>> [email protected] >>> http://pdml.net/mailman/listinfo/pdml_pdml.net >>> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. >> >> >> >> -- >> -bmw >> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
