Hi! @sandy-man, Thanks for stopping by HP forums!
I understand that after updating BIOS on your PC the images disappears for few seconds.
Don't worry I will try to help you out.
Did you make any software or hardware changes on your PC?
I have checked the records and the latest version of BIOS available for your PC in HP.com is A0.38.
I would suggest you downgrade the BIOS on your PC and check if it helps.
Please find the link to download A0.38 BIOS.
Also, Please refer this article to know how to restore BIOS.
Hope to hear from you soon!
Cheers! 🙂
A4Apollo
I am an HP Employee