Second monitor not working! help!

[fixmypc]

I tried to plug my tv in as a second monitor which I needed an adapter to display port for, so I bought an adapter. The tv is recognized by windows as a second monitor, but when I went to go find the source on the tv it wouldn't appear on any of the sources. I tested to see if my tv would pick up in the HDMI cable slot and if the display adapter was just faulty, but it still did not appear. Someone help

[fixmypc]

Forgot to mention, when I connect my laptop to my tv it works.

[Radium_Angel]

Maybe the default resolution is beyond what the TV can display? 

[fixmypc]

I have it set to 720p (what the tv requires, 2012 Plasma TV), and it still doesn't work. It also would run a duplicate screen on my laptop which is a razer blade stealth (more than 720p).

[ElSeniorTaco]

If I remember correctly, HDMI sets up a sort of digital link/ performs a handshake between the two devices, maybe there is something wrong in that link, and thus the tv doesn't even know something is connected. If this is indeed the case, I would try a different adapter, maybe a different model or type.

However with the info we got, I am not sure what it is, and this might all be beyond the point.

Some testing you can do, plug the same HDMI port into something else and see if it works.

Try the same cable as well with that other device and see if it works.

Try to connect your computer using the same adapter and cable to another tv and see if it works.

All of this will give us some data to play with.

But if its not showing up on the tv, as in you cannot select the source, I would think the computer and the TV are not negotiating the link.
In that case, I would try a better adapter, maybe the adapter needs a special feature with certain TVs to ensure the link is made, and maybe your adapter doesn't provide this.

However my expertise is not in TVs or HDMI, and so I cannot sure, take this with a grain of salt but consider it if you have no other alternatives provided.

[fixmypc]

7 minutes ago, ElSeniorTaco said:

If I remember correctly, HDMI sets up a sort of digital link/ performs a handshake between the two devices, maybe there is something wrong in that link, and thus the tv doesn't even know something is connected. If this is indeed the case, I would try a different adapter, maybe a different model or type.

However with the info we got, I am not sure what it is, and this might all be beyond the point.

Some testing you can do, plug the same HDMI port into something else and see if it works.

Try the same cable as well with that other device and see if it works.

Try to connect your computer using the same adapter and cable to another tv and see if it works.

All of this will give us some data to play with.

But if its not showing up on the tv, as in you cannot select the source, I would think the computer and the TV are not negotiating the link.
In that case, I would try a better adapter, maybe the adapter needs a special feature with certain TVs to ensure the link is made, and maybe your adapter doesn't provide this.

However my expertise is not in TVs or HDMI, and so I cannot sure, take this with a grain of salt but consider it if you have no other alternatives provided.

I tried to switch my hdmi cables for my tv and monitor, then the monitor did not work, but the tv did.

[kirashi]

1 hour ago, fixmypc said:

I tried to plug my tv in as a second monitor which I needed an adapter to display port for, so I bought an adapter. The tv is recognized by windows as a second monitor, but when I went to go find the source on the tv it wouldn't appear on any of the sources. I tested to see if my tv would pick up in the HDMI cable slot and if the display adapter was just faulty, but it still did not appear. Someone help

Where are you plugging the adapter / cable into on your computer for the TV to run as a secondary monitor? If you have a GPU, you'll normally need to use the second port on the GPU, and not use any graphics outputs on the motherboard, since those are normally disabled by default, and only some motherboards support using both a GPU and the integrated graphics at the same time.

 

Let us know your hardware specs as well so we can make sure there's nothing out of ordinary with your GPU regarding secondary monitors.