No power after disableling secure boot

[adrianc1]

HP All-In-One 24-f0035a. I disabled secure boot. I was asked to verify my decision with a code + enter or escape. Before I was able to enter the code the computer suddenly turned off. Now it does not appear to have power at all. I have checked the power source and transformer but all appear to be working. Is there a way to reset the computer from this state?

[Yoron]

Shouldn't have to do with the bios, check if it gets any juice first, power supply. And as long as you didn't change anything in the bios it should just be as before. Then again, the HP bios is rather weird, and lacking..

[Yoron]

Ah sorry, missed that you already checked it. In that case it do point to the bios. You could try the solution suggested here. By Dilip_18

https://h30434.www3.hp.com/t5/Notebook-Operating-System-and-Recovery/F9-and-F10-Boot-options-not-wor...

I'm considering it too, for my own system. It's a kind of last ditch try though.

[Yoron]

You need to read this though, before doing anything.

https://support.hp.com/us-en/document/ish_3966820-3438449-16

" CMOS reset instructions are specific to the system board installed on your computer. Find your computer model number, and then use it to get the reset steps (if available) on the HP Customer Support website. If steps specific to your system board are not available, use the generic CMOS reset steps. "

[adrianc1 · Accepted solution]

Thank you Yoron for your help. I discovered the problem was an intermittent fault in the power cable.