Today 2 pc refuses to enter UEFI 2 times.

[sde444]

Hi. I dont know why today 2 times my pc refuses enter to UEFI. I was pressing fast DEL and black screen and nothing happened so i was force hard reset. Now its ok. But it happened 2 times and i dont know why. It is something wrong with pc?
( i was in time of installing Windows 10 ) .Its no monitor , because signal was on.

My mobo is Asus Sabertooth Z97 Mark 2
CPU is 4790k no OC
Ram 2x8GB Kingston Hyperx 1600mhz

[Black_Phoenix]

Sometimes it happens in my GL551JW, it means that the keyboard taken a little more time to be detected.

If you try mashing the DEL key as soon you turn on your PC, didn't it work?

You could also if the MB have the option to add a small delay to the BIOS, between 2 and 5 seconds are enough.