Screen goes blank for a few seconds during boot

Hi

So I've been a Seven use for a few years now I regularly reformat my system, not always needed but I like a fresh start every 2 or 3 months, anyway since my last format (I tried Win 10, Nope) I've noticed when I'm starting or rebooting my PC I get my MoBo info and then the Windows Logo comes and goes, then it just goes off for a few seconds I say the screen goes blank, this isn't totally true, it goes to the "No Signal" screen for I guess about 15 or 20 seconds and after that it gets to my log on screen.
Very strange as has never happened before I used to get great boot times but this has killed that, I know its not a huge issue but I'd really like to get it solved and have my quick booting PC again!

I have checked boot sequence is correct but thats about as far as I can go on my own lol, I guessing it may be something to do with the Onboard Graphics in the 4790k & my GTX 970 maybe something doesnt like something else (tech speak) but I have no idea how I would proceed with troubleshooting and getting if fixed!

Any light shed on this would be great,

Many thanks for reading :)

Hi

Thanks for replying :)

Ok so I checked all drivers with the Gigabyte updater for my board updated any that needed it aside from Realtek HD Audio (had issues with it before and don't use it anymore) the Nvidia drivers should be fine as I only reformatted an couple of days ago and I got everything from their website.
I did have a Yellow Triangle in the Device manager (SM Bus Controller), but after updating all my drivers that has disappeared!

Rebooted a couple of times to see if it was still happening and it's still doing the same thing! I counted 18 seconds on first reboot & 13 on second reboot.

Hope that is all helpful to finding the Issue

Hi I'll post my start-up when I get home from work.



Yeah I have a SSD installed! Well it used to boot very quickly and still does in a way, but now there is a long pause with "no signal" in the middle of the boot. It used to do it exactly the same but without this 15sec spent on that screen.
If it had always done it I'd not be bothered lol, but as its only since the last format it's really annoying me to know whats different this time around!

When I get home I'll send a screen of my start-up and do a low res video on my phone of the boot process from start to finish to see if it help figure it out!

Ok here we go :) Even on my phones 480p setting the video came out too big to upload in one piece so I lowered the bitrate to get it under 8mb and zipped it :)

As you can see the Windows Logo loads at about 12seconds then I get a blank screen for a couple of seconds, the the TV notices there is nothing there and goes to "No Signal".

Its really weird as before this format it didn't do it and I try to do everything the same each time ... so... just annoying lol.

Thanks to you guys for trying to help,

Ok then, I'll report back in an hour or so!