Hello Dell community,

I have issues with Optiplex 7010 Tower (bios A29) trying to boot with high resolution screens (2560x1440, 3840x2160).

I have used the computer for some time with seemingly no issues. I used various graphics cards (FirePro V3800, Quadro 2000, GT 1030) mostly combined with one 1920x1080 screen connected to graphics card via DVI and one 1280x1024 screen connected to integrated graphics using DisplayPort to DVI adapter.

I recently purchased 2560x1440 screen, plugged it into the GT 1030 via HDMI and it worked as expected. When booting however, I get the Dell logo on the 2560x1440 display and then only black screen. I can not enter F2 or F12 settings. The secondary screen connected to integrated graphics shows only underscore in upper left-hand corner.

I suspected the new screen was faulty and connected the computer to 4K TV via the HDMI, but the result was the same - Dell logo and then black screen. Using the HDMI with 1920x1080 screen on the other hand - no issues. DVI on the GT 1030 works in the Opltiplex, if HDMI is not connected at boot. If I connect the HDMI screen after the Optiplex boots, there are no obvious issues until next boot.

The GT 1030 has no issues in older computers I have lying around (Core 2 / Athlon II) - boots with both 1440p and 2160p screens.

I tested few other configurations and pretty much anytime the Dell logo shows on screen that is higher resolution than 1920x1080, the Optiplex wont boot.

Were it not for covid, I could get more devices to test, but I am somewhat limited right now. The GT 1030 is under warranty. The Optiplex should be under warranty as well, but since I upgraded the CPU and cooler, I would like to avoid returning that one to the store until I am out of other options.

Do you happen to have any ideas?

Thank you.