Unsolved
4 Posts
0
705
Inspiron 5680, removed Microsoft CA UEFI, bios lost video
Is there a way to fix this? After hours of trying I was unable to boot Windows by pressing F12 and enter even without see nothing on the screen but my bios is buggy (Is acting strange too, I plug the chord, the PC turns on automatically, shutdown and turns on again and nothing happens, so in this stage if I restarted and press F12/enter I can boot Windows)
I try almost everything I know even dell PowerShell command to enable Microsoft CA again from Windows but this option don't appear on available commands. If someone know to reenable Microsoft ca UEFI on db SecureBoot again or any other way to restore the dell factory key default that includes this Microsoft ca, I will appreciate and very glad. = (
thiagoalmir858
4 Posts
0
July 10th, 2023 05:00
this is dell documentation from powershell command bios
Maybe a way to disable secure boot without going to firmware
RoHe
10 Elder
10 Elder
•
43.8K Posts
0
July 10th, 2023 12:00
Always include exact PC model and version of Windows in your posts.
Why and how did you remove Microsoft UEFI CA?
For starters, unplug power cord from rear of PC. Press/hold power button for ~30 sec. Then reconnect power cord to rear of PC and see if that stops the reboot cycles.
Have you tried pressing F2 at the Dell splash screen to get into BIOS setup so you can disable Secure Boot?
How is monitor connected to the PC, using a port on an add-in video card or an onboard Intel Graphics port?
Don't know if a BIOS Recovery will solve this UEFI CA problem....
thiagoalmir858
4 Posts
0
July 11th, 2023 11:00
this is my bios and the options, is the same, the option "remove uefi from ca" is here on the bios
thiagoalmir858
4 Posts
0
July 11th, 2023 11:00
Inspiron 5680 - Windows 11 22H2
I removed from BIOS in key management of secureboot, the dell bios/aptio have that option and dont do any warning about the removal. When I discover the dell powershell bios command, the documentation says about the remove could make video graphics unusable. Dell powershell command have option to enable from BIOS, but in my system the option dont appear.
I try all reset CMOS,NVRAM, JUMPER (that makes me other error with cmos checksum too with all this reset) and nothing resolved because this kind of reset wont reset keys of secure boot.
I finally did to disable secure boot without video by pressing the keys even without the bios on the screen (my dell bios is the simple one, not the one with graphical interface and mouse, i'm lucky) and now I can use my pc again. But if I turn secure boot obvious will turn off the bios graphics (Windows works without it if can boot) So my question now is: I can enable Microsoft UEFI CA 2011 back to bios? My pc is working fine except for secure boot. tpm (disabled because of secure boot disabled too) and the cmos checksum error with the reset of cmos that I did.
And I dont want to reflash bios in recover because i'm afraid that will enable secure boot
About the monitor connection, this dell model, the onboard graphics is disabled by dell (thank you so much dell for making a PC that works ONLY with graphics card and not onboard) so its connected to the dell gpu 1050 ti
RoHe
10 Elder
10 Elder
•
43.8K Posts
0
July 11th, 2023 12:00
If you already disabled things, you might just need to "enroll EFI" again.
You may have to physically remove the add-in GPU to use the onboard Intel DP port in this model which isn't uncommon.
If you reflash BIOS, Secure Boot will be re-enabled, but it should probably also undo the change you made that caused this problem. I'd try a BIOS Recovery vs a "regular" flash update, to make sure it corrects as many errors as possible, including the checksum error. Assuming the onboard DP works after you remove the add-in GPU, I'd run the BIOS Recovery that way.
Download the .rcv file for whichever version of BIOS is installed now and save on an empty (non-bootable) 2-GB USB, FAT32 formatted. Plug it into PC with power fully off. Then power and follow the instructions to run the BIOS Recovery at the link I posted above.
After that's done and PC reboots to desktop, shut down normally and reinstall the GPU to see if the problem is fixed...