Last week I downgraded the BIOS on my HP Z440 Workstation to version 1.62 Rev A. I got the bits and the instructions from the HP Drivers and Software support page for the product:
https://support.hp.com/us-en/drivers/selfservice/hp-z440-workstation/6978828
The issue that I was seeing is that after turning on the PC, there was no signal coming out of the DMS-59 port (on the NVIDIA 315 NVS graphics card that I was using). I've connected a DMS-VGA adapter and then try connecting the VGA cable to a display port on a Dell monitor, but the monitor is not picking up a signal--previously (before the BIOS downgrade) it was working fine. All other lights and noises on the desktop computer leave no indication that anything is wrong--but I have no way of checking because I cannot see the display of the computer. I have an ethernet cable attached to it and am able to use the command prompt on a different computer to successfully ping the HP Z440 that is having issues. I would just remote into it, but I never "enabled" remote connection in the HPZ440's settings.
I tried seeking help on a different forum (https://h30434.www3.hp.com/t5/Desktop-Video-Display-and-Touch/Graphics-output-doesn-t-work-after-I-downgraded-system-BIOS/m-p/6603472/Pop_SU#M100334) but was instructed to come here.
At this point, I don't even want this older BIOS version, I am fine with the latest BIOS version. I tried restoring the BIOS following the instructions on this page :
https://support.hp.com/us-en/document/c05163478
but only could get to step 8. (I had heard the 8 beep audio code, but then the system never turned back off).
Any suggestions? The computer is new, so I have no problem doing a full blown restore, although I thought that's what that document that I just listed was aimed at.