Monitor connection issues - DP to HDMI cable

Question

I am having problems connecting a monitor HDMI to a PC DP. (The monitor at issue is bolded below.) This is my setup:

OptiPlex 9020 - 2 graphics cards

- integrated with DP and VGA ports

- discrete with DVI and DP ports

3 monitors

- S2316H with VGA and HDMI ports

- ST2220L with DP, HDMI, DVI, and VGA ports

- U2419HX with DP and HDMI ports.

This is the configuration that I currently have:

- PC>>>VGA from integrated>>>S2316H VGA

- PC>>>DVI from discrete>>>ST2220L DVI

- PC>>>DP from discrete>>>U2419HX HDMI

This configuration works, but I want to get rid of the VGA connection and use DP-to-HDMI instead.

Here's my problem: The DP to HDMI adapter cable works when connecting the U2419HX or the ST2220 to the PC, but when I use the exact same cable to connect the S2316H to the PC, the monitor is not recognized. I've tried both input source settings - auto and manual (HDMI) - and neither works. I don't think that the cable is bad because it works with the other 2 monitors. What am I missing? Could the HDMI port on the monitor itself be bad? I couldn't get this to work when I first bought the monitor either (of course, warranty has long since expired).

Thank you. Any help would be greatly appreciated!

bmcowboy · Answer

Hi @Blues1967 ,

Try connect only the ST2220L by DVI and open Windows Display Property, then connect the problematic S2316H by DP-to-HDMI. Do the 2nd monitor detected in Display Property? If yes, try to change the output resolution and/or frequency for it.

Tesla1856 · Answer

@Blues1967 wrote:

1. The DP to HDMI adapter cable works when connecting the U2419HX or the ST2220 to the PC, but when I use the exact same cable to connect the S2316H to the PC, the monitor is not recognized.

Adapter cables are often not 100% compatible and should be avoided in general. Better to use plain cables and native ports.

Connect all 3 monitors to your dedicated video card and all should be fine.

Blues1967 · Answer

That worked. Thank you!!

CPA Doug · Answer

I have a OptiPlex 5070 with three Display Port connections only. I have 3 viewsonic monitors with HDMI, DV-I and VGA inputs. I purchased a Display Port to HDMI connector, used the HDMI connector I have been using with my previous computer. The results, are no display.

Any ideas? Do I have to purchase new monitors?

Tesla1856 · Answer

@CPA Doug wrote:

I have a OptiPlex 5070 with three Display Port connections only. I have 3 viewsonic monitors with HDMI, DV-I and VGA inputs. I purchased a Display Port to HDMI connector, used the HDMI connector I have been using with my previous computer. The results, are no display.

Any ideas? Do I have to purchase new monitors?

Adapter cables are often not 100% compatible and should be avoided in general. Better to use plain cables and native ports.

Additionally:

1. Better to not use HDMI unless you must or it's Home Theater.

2. If you must use HDMI, adapter cables rarely work due to HDCopyProtection (HDCP) . Keep it native.

In this case, I suggest you try a (high-quality/name-brand) DisplayPort-to-DVI or DisplayPort-to-VGA adapter cable.

DELL-Cares · Answer

Hi CPA Doug,

Thank you for contacting us, we would be happy to help you with the concern, could you please share the system service tag for us to review and assist you accordingly.

Regards,

Paventhan M

Erigon · Answer

I like those active dp to hdmi adapter which can do 4k at 60 hz. Usually they cost $18 to 20 but worth every penny.

Optiplex Desktops

Monitor connection issues - DP to HDMI cable

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