Yesterday I opened my machine to dust and clean it. Was extra careful with it. After re-assembling it and booting it, I got a "cpu fan error sceeen". So I tried moving the CPU fan around, getting it to a new position, and now I'm not getting any signal input from my computer at all. I've already tried moving almost every piece around, unplugging all the unnecessary stuff, but still no result. Would appreciate some help with this as it's the weekend, aka my only moment of rest of the week.
If the fan is spinning/hardware lights up but it's not hitting the UEFI/BIOS screen, you can probably get it to do the UEFI error codes: https://www.computerhope.com/beep.htm
Note: You'd need a speaker that is specific for the port to have the sound call out, and/or have a POST-card.