Hi,
So I've just got a P2715Q and like some others, I've been struggling with the DisplayPort to make it work past two days. If you're reading this you have probably realized that it is a common issue for this model and like many others I also experience blank screen or no signal when using DP, but Mini-DP works as expected with 4k resolution @60Hz and so does the HDMI but at 30Hz. I was able to get the monitor work on DP only 2-3 times (out of hours of try & failures) but even then, resolution was sub-4k @30Hz. I understand that it might be seen as a bad-cable issue, but then, why even this bad-cable is not persistently giving me connection and rarely works randomly?
Using mini-DP is only a temporary solution for me, because I will need to hook the monitor to a second system so I'll need to be able to use both ports.
Of course I have tried typical workarounds like unplugging power cable, trying two different DP cables, making sure latest driver is running, etc. I'm testing with a GTX 970 card.
My monitor is of rev 01 according to the box label, with part number 0GT67 ,also referred with 210-ADVO in some Europe countries. Manufacture date is April 2015 on the label.
I got mine in Sweden. Finding other relevant topics I came across this thread covering the same issue. The guy suggest that this issue is resolved in Rev 03, with part number X24K1 .
So I contacted local Dell support, hoping for replacing my monitor. They of course agree to replace, but with a refurbished model and not brand new. This unacceptable since it just does not makes sense to pay for a brand new item, and ask to replace it after one day of trying to troubleshoot. Even more bothering, according to tech-support guy he could not guarantee that I would receive a replacement of same revision or the latest one, so even replacing my unit sounds like *** 2 weeks of waiting time. Quiet disappointed here :-/
Trying again with a second Dell support guy, he at least managed to give me a list of (Sweden region) part numbers related to P2715Q. There were others but I asked him specifically for PN that are in Sweden's market. Interestingly he was not able to find anything with "X24K1" part number, and returned to me with below part numbers instead. He was not able say which hardware revisions are these PNs.
I will return my unit anyways, but before ordering/replacing it, I need to find a way to assure I can order newer revision, and not just waste a couple of more days of working hours to get back the same & possibly problematic model.