Question No display on boot, fixes after CMOS batter removed and put back in but have to repeat this every time I boot

[harveysmi]

A couple days ago I reset my pcs bios settings to default, now every time it boots there's no display.
I take the CMOS battery out and put It back in and it boots fine, I have to do this every time I boot it, I imagine there's a bios setting I need to change but can't find anything.

 

[rgd1101]

system spec?

 

[harveysmi]

system spec?

Hold on old pc let me find it

 

[harveysmi]

I5 7600k
8gb ram
Gtx 780 ti
Asus z170-k
Not 100% sure which PSU I have can take it out if needed.

 

[harveysmi]

HDD 1tb

 

[rgd1101]

the gpu fan spin when you first turn it on?

 

[harveysmi]

the gpu fan spin when you first turn it on?

Yes everything seems to be fine but no signal on display

 

[rgd1101]

take the gpu out and test with igpu?
was there a reason to reset bios?

 

[harveysmi]

Will do,the pc is actually my sister's and she managed to get her function keys locked on, only keyboards we have are 60% so no function lock key, I saw that you could reset it in bios but couldn't find the setting so reset the bios to default. I realise this was probably pretty dumb but didn't know any better.

 

[harveysmi]

Ok so I'm going to have to check the igpu later as she needs the pc right now sorry.

 

[scout_03]

the next time you start it check if system show the real time and date of the day .

 

[harveysmi]

It doesn't just 0 0

 

[scout_03]

so if time and date is not real one replace cmos battery first .

 

[harveysmi]

Ok will do

 

[harveysmi]

Update: replaced CMOS battery and still doing it also checked igpu and that's not fixed it either.
As soon as you remove the CMOS battery and boot the pc comes on the shuts down for about 5 seconds then boots and displays like normal.