PC fails to display BIOS/POST after CPU upgrade yet runs smoothly in Windows
PC fails to display BIOS/POST after CPU upgrade yet runs smoothly in Windows
The device installs smoothly on Windows 10. I'm writing this from the machine I'm fixing. Today I changed my wife's CPU from a 3700X to a 5950X. Her motherboard is the MSI B450 TOMAHAWK MAX (MS-7C02) with the latest BIOS (3.D0 - 04/01/2022). I first noticed an issue during startup. Instead of the post screen, my display remained dark until it finally showed the Windows login. I assumed it was a strange glitch from the upgrade, hoping next time it would show the post screen. I updated drivers and reset the PC, but the same problem occurred again. Then I powered off the computer and restarted it. This time the screen stayed black, but the POST LEDs on the motherboard indicated everything loaded properly. I suspect either the GPU isn't outputting anything or the CPU is behaving oddly. Has anyone had this experience before? Any suggestions would be appreciated. In case it helps, she uses a GTX 1070 GPU. Update 1: Clearing CMOS didn't resolve the issue. I also tried loading optimized defaults, but it didn't work. Update 2: I updated the BIOS to version 7C02v3A using the M FLASH tool. Still no post screen or BIOS settings, but I can reach Windows. Perhaps the problem lies with DisplayPort?
Have you explored another screen or HDMI port? It might also be that fastboot is active, which would be unexpected following the reflash.
As long as the device functions properly, you generally don’t need to worry unless you’re attempting to access the BIOS. You can adjust a delay for HDD startup; sometimes the system boots quickly, making it hard to notice the POST screen or even reach the point where you can press F2. In many situations, a default boot can be initiated by holding the power button until it stops, repeating this roughly three times, and then letting the system boot normally. This usually prompts you to enter the BIOS for configuration. Look for an option to delay HDD startup, set it around three seconds, and test whether this affects performance.
It's an issue with displayport on early GPU's. Check this link: https://www.nvidia.com/en-us/drivers/nv-...pdate-x64/ I had to do the same with my 1080 Ti. Not sure why the cpu upgrade triggered it.