DisplayPort to HDMi Adaptor - Only Able To Use 640x480 Resolution

[Rocky-Roader]

Me again

My MSi B850 Gaming Plus WIFI motherboard doesn't have a HDMI port, it only had a DisplayPort.

I don't have a GPU to try in it and my monitor is oldish and only had a DVi and a VGA port.

I purchased a DisplayPort to DVi cable and that works fine with my monitor.

I also purchased a DisplayPort to HDMi adaptor to connect it to my TV, I've tried this today and it seems that my resolution is limited to 640x480 when I use it.

My TV is a 43inch but I've had it since about 2012, my laptop has a HDMi port and when I connect that to the TV, the resolution is fine.


So am left with these thoughts...

The DP to HDMi adaptor - is cheap and may be the problem?
The TV being over 10 years old - may be the problem?


I don't mind buying a dearer adaptor, just thought it might be worth asking on here to see if anyone else has had the same problem, at some point I want to buy a new monitor and probably a GPU.

I have a 2022 TV in the bedroom but it's wall mounted with a fiddly bracket, I might try the HDMi adaptor with that when it cools down later to see if that confirms or rules out the TV.

 

[Tetras]

Could it be the EDID issue talked about here?

https://www.reddit.com/r/pcgamingtechsupport/comments/g1mtbw/comment/fnh0of5/

 

[Rocky-Roader]

Sorry for the late reply, the problem appears to be the 10+ year old tv,

When I connected the pc to the modern tv in the bedroom, the display was fine and I was able to change resolutions, the sound worked too.

I forgot to try the hdmi cable from the bedroom tv on my old tv though, so at some point I will test that to be 100%, although the old TV has 2 HDMI cables in which work fine for my sky and blu-ray so I don't think it'll be the cables.