Hi,
I have just purchased a Dell P2415Q and I am having issues.
I have a GTX970 GPU and I'm using the provided mDP to DP cable with Windows 10 and my issue is this:
When I turn on the PC the monitor wakes from sleep but doesn't display anything, no POST screen at all and a short time later it goes back to sleep. My PC is booting all the while and then all of a sudden the monitor wakes on the Windows login screen. When I first used the monitor it didn't display anything at all even after Windows had booted, I had to reconnect my old monitor to get the resolution down.
It doesn't end there, try as I might I cannot get the monitor to display at 3840x2160 @ 60Hz. I have the resolution available and it tells me that's the recommended one but when I try to change it the monitor just goes blank or sometimes sleeps and then wakes again when Windows automatically resizes back to 2560x1440 @60Hz. If I put MST to Secondary it will display the prime resolution but only at 30Hz. MST is set to off.
I have the latest Chipset, graphics drivers and the latest Dell monitor driver . My graphics card also has the latest firmware available. I have even updated my motherboards BIOS. I've seen some crazy things with PC's but never this and i am at a loss to explain it.
I've reset all the settings in the monitor and performed a hard reset but nothing. I have done I little research on this and it seems to be a common problem but there are no answers I could find.
Can you help?
Thanks.