GPU Not Working After System Reboot On Dell Optiplex 7040
I currently have an AMD Radeon RX 6400 plugged into the second PCIe slot on my Dell Optiplex 7040MT. It works fine when I first boot up into Windows 10 while being plugged into the gpu via HDMI. After rebooting, video is not outputted to the gpu at all. But if I plug into the apu, video is outputted. I would like to note that in the Dell BIOS, there is a setting called Video Controller. It says, "This setting is visible when multiple video controllers are connected to your computer. Three options are below. The auto settings defaults to the onboard video controller." The three options in the BIOS settings are Auto, Intel HD Graphics, and ATI Radeon HD Graphics. Auto was first selected even with a gpu installed while the hdmi cable was also plugged into the gpu. Changing the video controller graphics to ATI Radeon HD Graphics seems ok at first. After you save the settings and leave the BIOs and reboot the computer, the computer does not give a video output through the gpu. Switching to the onboard graphics even doesn't display video out. No video is outputted whether it's plugged into the gpu or even the motherboard. The only way to resolve this is to fully unplug the gpu from the motherboard let windows boot up, shut it down, plug in the gpu again and plug in the cable back into it. It then boots up fine as if nothing had ever happened. This is really irritating and not efficient. Is there any way to possibly fix this dumb issue?
The 7040 was first introduced in 2015. First thing, you might want to change the size 2032 CMOS battery if it's 5+ years old. Bad batteries have a habit of causing problems that are difficult to troubleshoot.
- Please kudos posts you like! - Please "Accept as Solution" posts that are a solution. - If you have an Optiplex, stating its model number AND size speeds up troubleshooting. Components vary.