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Mark2211
What's DOS?
Posts: 1
Registered: ‎10-31-2019
Location: CZ
Views: 2,284
Message 1 of 9

Lenovo Yoga C740 external display connection via USB

Hello, 

is there any way to connect extarnal fullhd Benq monitor to this computer model using only USB connection? For example via USB A to HDMI cable? Is it possible? The thing is this computer  neither has HDMI nor Thunderbolt but i would like to use external monitor with it.

 

Thank you for your suggestions,

 

Mark

Highlighted
Sr Support Specialist
Posts: 9,788
Registered: ‎11-30-2015
Location: PH
Views: 2,263
Message 2 of 9

Re: Lenovo Yoga C740 external display connection via USB

Hi Mark2211,

 

Welcome to the Community Forums.

 

Checking the product specification sheet for both Yoga C740-15IML Platform and Yoga C740-14IML shows supports two independent displays; Max resolution: 3840x2160@60Hz (USB Type-C).

 

You can use the USB Type C with the following accessories:

Lenovo USB-C 3-in-1 Hub

Lenovo USB-C to VGA Adapter

Lenovo USB-C to HDMI Adapter

Lenovo USB-C to USB-A Adapter

 

I hope this helps answer your query.

 

Regards



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Vmaxxer
What's DOS?
Posts: 1
Registered: ‎12-10-2019
Location: US
Views: 1,755
Message 3 of 9

Re: Lenovo Yoga C740 external display connection via USB

It appears that the DisplayPort connection is also the power delivery port. Which of those adapters also provides charging capabilities that is compatible with the C740?

 

Thanks!

Tuur01
What's DOS?
Posts: 1
Registered: ‎12-16-2019
Location: BE
Views: 1,634
Message 4 of 9

Re: Lenovo Yoga C740 external display connection via USB

Hi, I have a Yoga C740 (v2019) 14" and bought 2 ThinkVision P24h-10 Monitors which I would like to connect. First monitor is no problem, connected via USB C. I then connected the 2 monitors with each other via DP -> DP but the second screen isn't recognized by the Yoga.

How to solve this problem?

Thank you for your help because it's urgent.

JW2017
Paper Tape
Posts: 2
Registered: ‎06-02-2017
Location: US
Views: 863
Message 5 of 9

Re: Lenovo Yoga C740 external display connection via USB

I have the Lenovo USB-C 3-in-1 Hub and used it to connect an external monitor to my Lenovo Yoga C740 laptop, but it doesn't work. Can anyone help me"
EnriqueAlvarez
Blue Screen Again
Posts: 5
Registered: ‎01-26-2020
Location: ES
Views: 729
Message 6 of 9

Re: Lenovo Yoga C740 external display connection via USB

Hi, I'm going to buy a C740 14, but I don't know if it's possible to connect 2 displays in addition to the built-in display (3 displays at the same time).

 

For doing this I think that I should use two usb-c to hdmi or displayport adaptors at the same time. In addition to this, one of these adaptors must include a power input, for not depending of the battery.

 

Anybody could confirm this?

 

Which adaptor usb-c to displayport and power-in do you recommend me to buy? (Hub or docking are also welcome Smiley Wink)

Nexuo
Blue Screen Again
Posts: 3
Registered: ‎01-27-2020
Location: NL
Views: 659
Message 7 of 9

Re: Lenovo Yoga C740 external display connection via USB

@spidey101 The technical specs on Lenovo.com (https://www.lenovo.com/us/en/laptops/yoga/700-series/Lenovo-Yoga-C740-14/p/88YGC701292) say the USB type-C port for charging supports DisplayPort and no mention of HDMI.

 

Did i missed something? Or can HDMI also used if the USB type-C port support was specifically for DisplayPort? And if it does support HDMI, would that be HDMI 1.4 or 2.0? And which version of DisplayPort would that support be, as there is no mention of that in Lenovo documentations that i could find.

 

I'm also curious to the right answer as I'm also planning to use my new C740 14" with (multiple) external display.

EnriqueAlvarez
Blue Screen Again
Posts: 5
Registered: ‎01-26-2020
Location: ES
Views: 618
Message 8 of 9

Re: Lenovo Yoga C740 external display connection via USB

I have just discovered the "lenovo usb-c 7-in-1 hub" that it's a USB-C Hub (it looks like that it's not a thunderbolt one), and it has a HDMI output and also a power pass through (aka power input).

 

Maybe this hub could be used with C740 in one of the USB-C ports, solving the power problem for a 3 display configuration.

 

Has anybody tested this hub with the C740 14?

 

There is a compatibility list but the C740 is not listed ( https://accessorysmartfind.lenovo.com/#/products/GX90T77924 ) The point is that I habe serious doubts about the accuracy of this list that maybe is not updated at 100%. In fact I see no technical arguments for not being compatible this hub with the C740.

EnriqueAlvarez
Blue Screen Again
Posts: 5
Registered: ‎01-26-2020
Location: ES
Views: 468
Message 9 of 9

Re: Lenovo Yoga C740 external display connection via USB

Hi all! Finally i've just bought a C740 14" and I've tried the 3 display configuration. The fast answer is that YES it does work with a 3 display monitor.

 

For achieving this I used 2 USB-C to HDMI adaptors. The bad point is that with these adaptors I couldn't test the displayport connection. The other bad point (for me the most important one) is that I couldn't test if this configuration is compatible with a power pass through for avoiding the need of the battery...

 

It's a shame the lack of information from Lenovo about this!

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