I recently bought a 4K screen (PHILIPS 288E2A 28 inches).
A 4K HDMI cable was included, but I also have another 4K HDMI cable for my Apple TV (Amazon: Ultra HDTV 4K HDMI cable - 2 meters, 18 GBit / s High Speed HDMI 2.0b, HDMI Premium Certificate, 4K @ 60Hz (smooth), resolution up to 2160p 4096x2160, HDR10+, 3D, ARC, Dolby Vision).
If I connect the screen to my MacBook or Apple TV using an HDMI cable (whichever of the two), it runs at 60Hz and 4K.
Now I wanted to connect my Windows laptop - unfortunately not 60Hz. It doesn't even look like 30Hz.
Well, you might think it's the laptop. But on my old (HD) screen I get 60Hz (with the same HDMI) cables.
I have already tried the following things:
every device restarted
Ports of the two cables exchanged (the screen has 2 HDMI connections)
tried with MacBook / AppleTV
tried with a non-4K HDMI cable
I'm very grateful for help.
On the old HD you have fu 60Hz. None on the 4K. I think that solved the problem. I guess your laptop only has the integrated iGPU of the processor and it can't do 60Hz in 4K.
Then the laptop would have to transmit 60Hz with a non-4K HDMI cable?
The cable doesn't matter. But the HDMI output on the laptop will probably just not be designed for 4K 60Hz. If that is only HDMi 1.4, for example, then 1920x1080 with 60Hz but 4K only work with 30Hz
Can I then change the laptop so that only HD should be transmitted?
Yes, you can set that your 4K monitor should only output in 1080p. Then it should also work with 60Hz.
With Windows I can't change the resolution of the monitor (it is already with HD) and I have not found a setting for the monitor itself
Under Windows you can change the resolution in the display settings.
Yes, and as I said, it's HD and not UHD
Then I have no idea.
