out of ideas..

Admiral Huddy · 6 Sep 2018 at 14:06

Can anyone think of any reason why my system occasionally boots in to the UEFi screen?

ASUS Prime Z270-A Motherboard
Corsair Vengeance LPX 16GB (2x8GB) DDR4 PC4-25600C16 3200MHz
Intel Core i7-6700K 4.0GHz (was running at 4.4)
Gigabyte GeForce GTX 980
EVGA SuperNova G2 750W '80 Plus Gold' Modular Power Supply

Mobo battery replaced,
Checked voltages on PSU .
RAM verified on Memtest.
I've ran Prime blend on stock setting, just as a stock test.
I even reinstalled Windows from a fresh image.

All I do is hit cancel and it boots fine. As I said, it's an intermittent problem but all my checks have come back fruitless.

ttaskmaster · 6 Sep 2018 at 14:12

Biscuit crumbs under the del/F8 sporadically jamming the key down?

Admiral Huddy · 6 Sep 2018 at 14:32

ttaskmaster said:
Biscuit crumbs under the del/F8 sporadically jamming the key down?

I'll double check this.. I'm prone too the odd "one-hand" digestive

orbitalwalsh · 6 Sep 2018 at 15:00

wondering if ou try booting with the keyboard not plugged in if it'll happen ( if cleaning didnt work)

FlyingScotsman · 6 Sep 2018 at 15:50

Yeah boot without your keyboard and see if still tries to go into the UEFI setup.

Steampunk · 6 Sep 2018 at 20:47

If it's the keyboard issue, it's probably the system booting too fast before the keyboard comes up and gets detected, then stops because it didn't detect the keyboard. You might have to play with the USB detection settings so the system does a full detection of USB devices, rather than a fast detection.

adidan · 6 Sep 2018 at 20:53

Admiral Huddy said:
I'm prone too the odd "one-hand" digestive

I really hope that's not a euphemism :eek:

The only other thing I can think of is if Directkey is enabled and disable that.

something daft already!! · 6 Sep 2018 at 21:16

Have you updated BIOS? Perhaps it's a bug in there.

siumatfung · 6 Sep 2018 at 22:50

What boot disk are you using?

Jamin280672 · 6 Sep 2018 at 23:04

Usually it will boot straight into the bios when it cant find a boot device, could be a sign you hard drive is failing, try another sata cable and a different connector from your PSU.

Ice Tea · 7 Sep 2018 at 08:11

https://www.asus.com/uk/Motherboards/PRIME-Z270-A/HelpDesk_BIOS/

PRIME Z270-A BIOS 1302
Improved system stability.

I'm guessing you're already running the latest Bios , Just a thought.