No screen

[monstermonroe]

After disabling graphics on mb in device manager my screen had gone blank and now can’t see anything to fix or get to bios, any help much appreciated. Steve

 

[Cycloid Torus]

Please read: https://www.techspot.com/community/topics/how-to-write-an-effective-question.242488/

 

[MaikuTech]

For starters system specs would help out, that includes your gpu or onboard gpu card, monitor name and model number.

 

[DavidBailey]

any help much appreciated

If you had factory recovery discs you could try using them.
They SHOULD over-ride any changes you made & restore to original factory specs.
Mine did.>Gateway $20.
If available they would be cheaper than going to a computer repair shop.
Unless someone has a better idea, try unplugging the monitor.
Shut down computer.
Unplug it & press Power button to discharge capacitors.
Start it up.
Reattach monitor.
It MAY try to reinstall graphics things.
It's worth a try.
It won't hurt.
And you will learn in the process.

EDIT--- In the future make system images with something like Macrium Reflect.
If you have no visuals even that wouldn't help.
EDIT#2--- If your monitor connects via USB try another port upon reattaching.
EDIT#3---
I pretty much know what I'm doing---

I generally know what I'm doing.