lost external(2nd) monitor after BIOS update

[Art18]

Hi.

This is the 2nd time this happened. One time, an online agent was able to fix the problem. I recently did a BIOS update and after the update, my notebook won't detect my 2nd external monitor. I tried updating the graphics card manually but to no avail. Any ideas?

[FlashRam1714]

Hello @Art18,

Welcome to the HP Forums!

I understand that your HP Envy Notebook is not detecting your second monitor after updating the BIOS. 

How are you trying to connect the screen to the notebook?

Start with a hard reset. Once the notebook is back on, try the steps in these documents so the second screen will be detected.

HP Notebook PCs - Connecting a Monitor, Projector, or TV (Windows 10, 😎

HP Notebook PCs - Green Screen and Other Video Playback Issues (Windows 10)

I look forward to the result of the troubleshooting from these documents.

If this information has helped you click the thumbs up!

[Art18 · Accepted solution]

Thanks for the reply.

I did resolve the issue by manual recovery of the BIOS. 

http://support.hp.com/us-en/document/c02693833

[BrianGW]

Hi guys

Found that if you flash the BIOS while the monitor is plugged into the HDMI port it disables or loses the port. If this has happened to you:

- Unplug all peripherals

- Redo the BIOS update.

I had already backed out the BIOS update (with the plug still in) and that hadn't helped. I reapplied the BIOS update using the HP Support Assistant - Updates - Action Log. Select the HP Notebook System BIOS Update. Once it's completed plug the monitor in and all will hopefully be well!

[Jay146]

I had the same problem in 2019 on my HP Omen laptop. After a pushed-windows update, my bios got updated. After that my ubuntu boot-up time increased and my second monitor was no longer being detected. The solution was to disable secure boot in the bios.