4k TV as monitor - stuck at 30Hz

[treeroy]

Hello,

 

I am trying to connect my PC to my 4k TV. I have connected the TV via HDMI-to-HDMI. I've looked at settings on the TV and cant see anything relevant. I don't know why it can only display 30Hz when normally without the PC connected, it displays 60Hz fine.

 

Any advice? I have looked at suggestions online and can't find a solution. Its a brand new TV, a Samsung UE50TU7100. Specs are here - https://www.samsung.com/uk/tvs/uhd-4k-tv/tu7100-50-inch-crystal-uhd-smart-tv-ue50tu7100kxxu/

The specs don't state whether it requires a certain connector to use 60Hz from a PC - and I would prefer to diagnose the issue before spending £20 on new cables to try.

 

The TV has 2 HDMI ports, no other video ports.

 

Thanks

 

 

 

[OrangeSunshine]

Try looking in the TV's menu for some sort of pc settings. Sometimes TV's do weird stuff when you connect a computer. Also, have you tried both ports? If not, check the ports on the TV to see if there is a little computer symbol above one of them because sometimes TV's require a PC be plugged into a specific port to operate correctly.

[tikker]

Could simply be the cable. How long is it and is it a proper one (doesn't have to be ultra expensive, just a proper certified one and not a cheapo one)?

[treeroy]

11 minutes ago, OrangeSunshine said:

Try looking in the TV's menu for some sort of pc settings. Sometimes TV's do weird stuff when you connect a computer. Also, have you tried both ports? If not, check the ports on the TV to see if there is a little computer symbol above one of them because sometimes TV's require a PC be plugged into a specific port to operate correctly.

The TV identifies it as a PC whether its plugged into HDMI 1 or 2. One port has a "eARC" tag but other than that, no difference.

I looked at the different game mode settings and can't find anything that makes a difference.

 

10 minutes ago, tikker said:

Could simply be the cable. How long is it and is it a proper one (doesn't have to be ultra expensive, just a proper certified one and not a cheapo one)?

It's an Amazon Basics HDMI 2.0 cable.

[treeroy]

Managed to find how to change the refresh rate in Windows. It auto-reverts to 30hz every time I connect which is annoying, but livable. Thanks anyway.

[tikker]

25 minutes ago, treeroy said:

Managed to find how to change the refresh rate in Windows. It auto-reverts to 30hz every time I connect which is annoying, but livable. Thanks anyway.

Ah, I thought you meant there was no option to select 60 Hz at all. Well at least you have a solution that works for you.

[treeroy]

4 minutes ago, tikker said:

Ah, I thought you meant there was no option to select 60 Hz at all. Well at least you have a solution that works for you.

the refresh rate info was greyed out so I didn't realise you could change it