Second screen detected but displaying nothing.

Question

Hello everyone,

After multiple searches, I can't seem to solve my problem, so I'm turning to you:
The fact is that I just moved and reinstalled my PC with its two monitors, a LG 21/9 and a Samsung (A SyncMaster 2333 (The one that doesn't display anything)). The Samsung is detected by the computer but displays nothing.

The screen only has a VGA output and is connected to the PC (more precisely to the graphics card) via an HDMI adapter. I want to emphasize that this system worked perfectly before, and it seems that I had the same problem during my previous move.

I have already tried several manipulations that I saw in other posts with the same problem, but nothing works:
- Enabling the multi-screen option in the BIOS
- Trying with other VGA cables

I don't know what to do...

My configuration if it can help:

Operating System
Windows 10 Home 64-bit
Processor
Intel Core i5 7500 @ 3.40GHz: 44 °C
Kaby Lake Technology 14nm
RAM
16.0 GB Dual-Channel Unknown @ 1066 MHz (15-15-15-35)
Motherboard
MSI H270 GAMING M3 (MS-7A62) (U3E1): 31 °C
Graphics
LG ULTRAWIDE (2560x1080@60Hz)
SM2333TN (1920x1080@60Hz)
4095 MoNVIDIA GeForce GTX 1070 (NVIDIA): 33 °C
Storage
232GB Samsung SSD 850 EVO 250GB (SSD): 32 °C
2794GB Seagate ST3000DM008-2DM166 (SATA): 30 °C
4657GB TOSHIBA External USB 3.0 USB Device (SSD): 32 °C
Optical Drives
No optical drive detected
Audio
Logitech G933 Gaming Headset

Thank you in advance for your responses.

epsilon59 · Accepted Answer

When you turn on both screens, one of which remains black. Your mouse pointer is on the first screen. When you move it to the right, does it get stuck or does it disappear as if it were on the second screen?

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Posted from CCM Live forum for Android

epsilon59 · Answer

Hello, and in reverse. Set the Samsung as the main display. Connect it to the GTX output via VGA  -- Posted from CCM Live forum for Android

epsilon59 · Answer

There is nothing appearing on the screen, not even a no signal  -- Posted from CCM Live forum for Android

epsilon59 · Answer

I suppose you don't have another screen; the screen must have died.  -- Posted from CCM Live forum for Android

epsilon59 · Answer

What happens when you set the Samsung as the primary display and the LG as the secondary one, via the GTX control panel?  -- Posted from CCM Live forum for Android

Maxhalo · Answer

The screen is still functioning; I just plugged it into a MacBook Pro, and it correctly displayed its extended desktop.

epsilon59 · Answer

There are no yellow exclamation points in the device manager. Your HDMI/VGA adapter, is it a cable or something else?  -- Posted from CCM Live forum for Android

epsilon59 · Answer

Weird, the adapter is active. Or is it just a simple adapter... Active is for making digital work on analog  -- Posted from CCM Live forum for Android

epsilon59 · Answer

Unplug and plug your adapter back in after shutting down the PC  -- Posted from CCM Live forum for Android

epsilon59 · Answer

When the PC is turned off. Unplug the power cord and press the power button of the PC to remove any residual current. Then reattach your adapter.  -- Posted from CCM Live forum for Android

epsilon59 · Answer

How many HDMI outputs do you have on the GTX  -- Posted from CCM Live forum for Android

epsilon59 · Answer

By connecting the Samsung to the HDMI output and the LG to the DisplayPort, it's still the same.  -- Posted from CCM Live forum for Android

epsilon59 · Answer

And plugging in the Samsung at the same time. Does it turn on?  -- Posted from CCM Live forum for Android

epsilon59 · Answer

He has no signal coming in, that's why the screen goes to sleep. On the GTX, which output is the priority?  -- Posted from CCM Live forum for Android

epsilon59 · Answer

The HDMI output for you makes the LG display the second desktop; I don't think it's the priority output. I would lean more towards the DVI-D output than the DisplayPort. I would rather suspect an issue with the adapter, given that your Samsung works on your Mac.

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Posted from CCM Live forum for Android

epsilon59 · Answer

Other than the GTX. Does your motherboard have a VGA output? If yes, connect the Samsung to it and unplug all those connected to the GPU.  -- Posted from CCM Live forum for Android

epsilon59 · Answer

I'm stuck here, yet my setup is the same as yours.  -- Posted from CCM Live forum for Android

epsilon59 · Answer

I would have tried, just in case, to check the drivers to see if they are up to date but I doubt it.. I hope you find the solution, here or elsewhere. I will look into it on my side. Have a good evening

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epsilon59 · Answer

Hello, is your problem resolved? I searched on my side, and I didn't find anything.
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ASUS PC. Intel Core i5-4460S processor - 8GB memory - 2TB storage - NVIDIA GeForce GTX 745 - 3 external HDDs. OCZ500SXS 500W power supply. Windows 10 version 1803.

epsilon59 · Answer

Re. Don’t you have another screen with a VGA input? I think there might be an issue with the adapter coming from the GTX that works on the Mac.  --

epsilon59 · Answer

Hello, have you found the problem? It seems to me that it's at the level of the graphics card output.  -- ASUS PC. Intel Core i5-4460S processor - 8GB memory - 2TB storage - NVIDIA GeForce GTX745 - 3 external hard drives. OCZ500SXS 500W power supply. Windows 10 version 1803.

Second screen detected but displaying nothing.

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