Dual Monitor DisplayPort to USB-C Monitor Not Detected

[DBee1]

I can't get a second monitor recognized with a DisplayPort (out of the PC) to USB-C Port (into the monitor) cable. I have the following HP desktop:

HP ENVY Desktop - TE01-0175xt

NVIDIA GeForce GTX 1660

Product Number 3UQ86AA#ABA

I've tried disconnecting cables. Windows is updated. 

[BeemerBiker]

What model monitor?

cables with adapters do a signal conversion and are generally one-way.

If the cable is designed for USB-C to DP then it can not be reversed DP =>USB-C

Can you provide a link to the cable so I can read the specs?

Link to the monitor you bought?

[DBee1]

Lenovo® L27m-28 27" FHD WLED Monitor 

USB C to DisplayPort 10 Feet Cable, BENFEI USB Type-C to DP Adapter [Thunderbolt 3 Compatible] for MacBook Pro 2018/2017, MacBook Air/iPad Pro 2018, Samsung Galaxy S10/S9, Surface Book 2 and More

• USB TYPE C (Thunderbolt 3 Port Compatible) to DisplayPort cable connects a computer or smartphone with a USB Type-C port to a monitor or projector with DisplayPort input; USB-C port of host requires DisplayPort Alternate Mode support to view video over USB
• 4K UHD DISPLAYPORT video resolution support for ultra high definition resolutions up to 4K x 2K (3840 x 2160) @ 60Hz; Supports Multi-Stream (MST) for daisy chaining multiple monitors and high precision audio such as LCPM, DTS, and Digital Dolby; A DisplayPort cable (sold separately) is required
• DELL COMPANION lightweight adapter weighs less than 1 ounce; Latest to legacy display adapter connects to monitors with DisplayPort in the conference room or classroom; Compatible with popular Dell models with Thunderbolt 3 ports including the Dell XPS 12 / 13 / 15, Dell Alienware 13 / 15 / 17 and the Dell Precision 15 / 17
• DISPLAYPORT PORTABLE ADAPTER connects from your computer to a 4K monitor with a USB C to DisplayPort cable; Low-profile and reversible USB Type C connector clicks into place on your device and latches on the DisplayPort connector provide a snug and secure connection to the display monitor
• USB-C & THUNDERBOLT 3 port compatible with computers and video over USB equipped smartphones such as 2016 Macbook Pro, the 2015 MacBook, Google Chromebook Pixel, Acer Aspire R13 / V15, S5-391-6419 Nitro / V17 Nitro, Predator 15 / 17, ASUS ROG G752VL / GT752VT / GT752VY / GX700VO / ASUS ZenBook Pro, UX501VW, Clevo P750DM / P770DM / P870DM, Lumia 950/950XL, ThinkPad P50 / P70, Yoga 900 13, LG G5, MSI GS40 / GS60 / GT72 / GT80 / Vortex/ WS60 / WS72, and Razor Blade Sheath

[BeemerBiker]

Your monitor has VGA, HDMI and USB-C inputs..  A quick test is to use HDMI cable make sure it works

You mentioned mentioned USB-C to Display Port and I guessed this cable which may not be right one exactly.

Not all USB-C to DisplayPort are reversable

https://support.plugable.com/t/usb-c-to-displayport-adapter-usbc-dp-is-not-bi-directional/12238

Your system does not have USB-C that can carry video.  It only has gen1 ports so you need a Display port to Display port to connect to your monitor.  I do not know of any DP to USB-C or if any of them are bidirectional.

[DBee1]

Super helpful. Thank you. I did check HDMI on the monitor by itself (one monitor config) and that worked, so it must be the cable. Now I've ordered a DisplayPort to HDMI from Amazon. Will see if that works. Description says it should.

[banhien]

@DBee1 

Its specs

         https://support.hp.com/us-en/document/c06432435

It has 1 USB-C port at its front which does not support Alt mode therefore you can NOT connect it to a monitor. You can use a native VGA monitor to connect to it VGA port.

Regards.