Windows 10 laptop problems with graphics driver and hdmi connection?

A friend of mine is having a big problem with her laptop right now. She has her laptop permanently connected to her TV via HDMI, never had any problems. Every now and then changed with her graphics tablet, no problem. Today she wanted to draw on the tablet [such a thing that is also directly a screen] something while I was visiting and connected via a HDMI splitter both TV and tablet, so I could watch on split screen videos in the meantime. Since the problem went off.

First, the laptop has registered itself as the second screen and both tablet and TV as the same, first monitor. Suddenly the TV did not want to connect anymore, but then again it was only via the HDMI2 connection of the TV.

She has updated the driver of her video card in the hope that it will bring something and now he recognizes neither tablet nor TV, claims she has no graphics card. She has already reset the laptop completely but that has not changed anything. No matter how many times she tries to reinstall the driver, regardless of whether she uninstalls the old one or not, nothing changes.

Update: Graphics card will probably be recognized again, but the driver problem and hdmi / VGA problem still exists. Does anyone have a solution to the problem?

Since we do not know what's the thing and what brand dingens is, you can say that bad.

I remember the TV reset. And then try without the things again.

Was it related to the laptop, the splitter or the tablet? The laptop is from HP, the splitter no name brand [whether or not here with nothing funzt] and tablet from huion

We have already noticed that the problem is s.Laptop the TV could be easily connected via HDMI with their ps4

Maybe a defective HDMI socket on the laptop.

This can be roughly checked if you go to the BIOS. Then the BIOS would have to be synonymous s.TV to see.

No driver is needed for this.

VGA does not work synonymous, could be the same problem? If she installs a new driver everything seems to be good until she puts VGA or HDMI a, then it behaves as if never a new driver was installed

As I said, turn on an external monitor and go to the BIOS. No drivers are needed for this. If that does not work, what's wrong with the controller?