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T420 with Displayport

T400/T410/T420 and T500/T510/T520 Series
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Cronus71
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Joined: Mon Dec 13, 2004 8:16 am
Location: Singapore

T420 with Displayport

#1 Post by Cronus71 » Wed Apr 05, 2017 10:36 pm

Hi folks,

I have a question regarding connecting the T420 to a TV.

Can I just buy one cable from the T420 Displayport to the TV HDMI?
Like this
Image

Or is there any particular reason why I ought to buy an adapter instead?
Such as this one
Image

Than you for any advice.

dr_st
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Re: T420 with Displayport

#2 Post by dr_st » Wed Apr 05, 2017 11:08 pm

Well, a direct cable is more convenient for this particular purpose, but an adapter gives you more flexibility; you can reuse the cable for something that has an HDMI output. In particular, if you already have the cable, you may want to get a smaller/cheaper adapter instead of a whole new cable.
Thinkpad 25 (20K7), T490 (20N3), Yoga 14 (20FY), T430s (IPS FHD + Classic Keyboard), X220 4291-4BG
X61 7673-V2V, T60 2007-QPG, T42 2373-F7G, X32 (IPS Screen), A31p w/ Ultrabay Numpad

TonyJZX
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Re: T420 with Displayport

#3 Post by TonyJZX » Thu Apr 06, 2017 1:14 am

there's no difference

I'm still not certain if the 420/420s intel nvidia can actually pass audio?

My test with my intel 420s didnt work.

dr_st
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Re: T420 with Displayport

#4 Post by dr_st » Thu Apr 06, 2017 2:39 am

Yes, it can, as I told you in your thread back then.
Thinkpad 25 (20K7), T490 (20N3), Yoga 14 (20FY), T430s (IPS FHD + Classic Keyboard), X220 4291-4BG
X61 7673-V2V, T60 2007-QPG, T42 2373-F7G, X32 (IPS Screen), A31p w/ Ultrabay Numpad

Cronus71
Posts: 30
Joined: Mon Dec 13, 2004 8:16 am
Location: Singapore

Re: T420 with Displayport

#5 Post by Cronus71 » Thu Apr 06, 2017 6:22 am

Great, thank you both for your help! :)

TankPad
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Re: T420 with Displayport

#6 Post by TankPad » Thu Apr 06, 2017 6:41 am

It may or may not work, depending on whether it has an IC built in. Some adapters function as a simple line converter and others have a logic controller inside. You want one that has the IC, often tagged as "Active" adapters etc. I've tried a number of these cheap adapters and switch cables with my T420 too.
| 701c | X220 | T420 | X230 | T430s | W540

dr_st
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Re: T420 with Displayport

#7 Post by dr_st » Thu Apr 06, 2017 7:18 am

You don't need an active adapter to get HDMI out of a DisplayPort++ port.
Thinkpad 25 (20K7), T490 (20N3), Yoga 14 (20FY), T430s (IPS FHD + Classic Keyboard), X220 4291-4BG
X61 7673-V2V, T60 2007-QPG, T42 2373-F7G, X32 (IPS Screen), A31p w/ Ultrabay Numpad

nikki605
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Re: T420 with Displayport

#8 Post by nikki605 » Thu Apr 06, 2017 9:45 am

I bought a basic Displayport to HDMI cable for my T410. It passes video & audio to my TV just fine. My T410 has the Intel HD Graphics.
Gary A.

lenovo: T490 (20N20028US) | i7-8565U | 16GB | 512GB SSD | FHD LED | WiFi 9560 | Bluetooth | Webcam | Win10 Pro x64 | Full System Specs

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