

Maybe the board thought the CPU fan was cooked and it was preventing a boot for safety? I’ve never seen anything like that safety speaking, but I could believe it exists.
I’ve owned and worked on computers that have that as a safety feature. If the CPU fan wasn’t connected or wasn’t working, they wouldn’t boot. They would usually have a beep code to let you know, but that’s assuming that there’s a motherboard speaker and it’s working.
A shorted fan would probably trigger it, as they would usually use the third cable on the fan connector to measure the rpm and check that the fan was spinning 👍
I’ve got a Lexmark laser printer, and while there are cheaper subscription toners, you can pay the higher price for normal toner, and buy compatibles, for now at least.