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D-SUB No Signal Issue on LG 19M38A-B Monitor with MSI H110M PRO-VD Motherboard

michalw114 20634 17
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Why does my LG 19M38A-B monitor show "D-SUB No signal" when connected to an MSI H110M PRO-VD PC with a GeForce GTX 1060, and how can I make it work for BIOS installation from a USB drive?

The problem is that the monitor is being connected with the wrong kind of video output/adapter: a GTX 1060 with DVI-D dual link does not provide analog signal for D-SUB/VGA, so a passive DVI-to-D-SUB adapter will not work [#17019784][#17019838][#17022406] You need the correct adapter/converter for an analog VGA/D-SUB connection, and the adapter must be the type with the extra 4 analog pins around the long blade; the one you bought was missing those lines [#17022406] Also, connect the monitor to the graphics card, not the motherboard, because with a discrete GTX installed the board output may be disabled [#17022509][#17022570] Since the monitor works on a laptop via D-SUB, the monitor and cable are OK, so the remaining issue is the PC-side output/adapter [#17022351]
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  • #1 17019716
    michalw114
    Level 7  
    Posts: 11
    Rate: 3
    Hello,
    so I have a problem with the monitor that is connected to the freshly unpacked computer. I checked everything carefully with the cables, but the monitor still does not respond and it says "D-SUB No signal Entering the power saving mode shortly". The computer does not have Windows loaded, and I want to do it with a PenDrive, only for this I need a bios.
    Computer parameters:
    Processor: Intel Core i5-7400
    Graphics: GeForce GTX 1060
    Motherboard: MSI H110M PRO-VD

    Monitor: LG 19M38A-B

    Thanks in advance for any help.
    greetings
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    #2 17019784
    safbot1st
    Level 43  
    Posts: 21951
    Help: 2719
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    The computer has a power supply?
    Does he turn on at all? This PC?
    The same on another monitor?
    michalw114 wrote:
    D-SUB

    You're going through a DVI adapter from this GTX1060, so know they are DVI on analog output and use that.
    Change the adapter. Change the cable.
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  • #3 17019800
    michalw114
    Level 7  
    Posts: 11
    Rate: 3
    The ac power adapter is probably built into the computer.
    Yes it turns on.
    I connected to the TV via HDMI and it works normally.

    Added after 3 [minutes]:

    Okay, so it's best to buy a D-SUB to DVI adapter
  • #4 17019838
    safbot1st
    Level 43  
    Posts: 21951
    Help: 2719
    Rate: 1583
    safbot1st wrote:
    GTX1060

    What model is it and what connectors does it have?
    After all, I wrote that DVI has an analog connector only in one of its types.
    That square star in the plug, that's the analog signal. If it is not there, there will be no signal on the D-SUB, check it first:
    D-SUB No Signal Issue on LG 19M38A-B Monitor with MSI H110M PRO-VD Motherboard
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  • #5 17019878
    michalw114
    Level 7  
    Posts: 11
    Rate: 3
    TE DVI-Ddual link. I've already checked everything, thank you
  • #6 17022214
    michalw114
    Level 7  
    Posts: 11
    Rate: 3
    I bought this adapter and the monitor still does not respond.

    Added after 2 [minutes]:

    I also noticed that if I connect this D-SUB cable to the adapter and not yet connecting it to the computer, NO SIGNAL pops up, then there could be a problem with the cable?
  • #7 17022251
    safbot1st
    Level 43  
    Posts: 21951
    Help: 2719
    Rate: 1583
    michalw114 wrote:
    connecting it to the computer, NO SIGNAL pops up

    By connecting the monitor to the network and the switch, you will have such a message with the cable disconnected.
    It's best to connect something 100% working via D-SUB to this monitor, such as a laptop, to check that the monitor is working.
    michalw114 wrote:
    could this be a cable problem?

    Come on with PC, but, ... yes.

    Added after 1 [minutes]:

    We don't know exactly what kind of PC it is:
    michalw114 wrote:
    The ac power adapter is probably built into the computer.

    Eh there "built in" ... put your head inside and read the sticker on the power supply.
    Enter the model.
  • #8 17022262
    michalw114
    Level 7  
    Posts: 11
    Rate: 3
    The cable works.
  • #9 17022273
    safbot1st
    Level 43  
    Posts: 21951
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    Rate: 1583
    I understand. Will I get the power supply model?
  • #10 17022277
    michalw114
    Level 7  
    Posts: 11
    Rate: 3
    If it worked via HDMI, if I bought a D-SUB to HDMI adapter, is there a chance that it will work?
    Please here is the model:
    Be Quiet! POWER SYSTEM 8 500W (BN241)
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  • #11 17022304
    safbot1st
    Level 43  
    Posts: 21951
    Help: 2719
    Rate: 1583
    michalw114 wrote:
    if I bought a D-SUB to HDMI adapter, is there a chance that it will work?

    Then you need all the "fluff" with the converter. Since the TV works via HDMI, the monitor should also, but before buying the converter, it is worth checking the monitor yourself first, e.g. with a d-sub laptop.
    michalw114 wrote:
    The cable works.

    How did you check it?
    Maybe an adapter. Do you connect 100% to the output marked in red on the picture?
    Include photo outputs and adapters on 2 sides.
  • #12 17022351
    michalw114
    Level 7  
    Posts: 11
    Rate: 3
    Monitors with D-SUB cable work when connected to a laptop. D-SUB No Signal Issue on LG 19M38A-B Monitor with MSI H110M PRO-VD Motherboard D-SUB No Signal Issue on LG 19M38A-B Monitor with MSI H110M PRO-VD Motherboard
  • #13 17022406
    safbot1st
    Level 43  
    Posts: 21951
    Help: 2719
    Rate: 1583
    Maestro, you had clearly marked (in the red border, post # 4!) Where the analog signal is going.
    In the photo on the right you have an adapter without analog lines.
    Get the correct adapter:
    D-SUB No Signal Issue on LG 19M38A-B Monitor with MSI H110M PRO-VD Motherboard
    it is supposed to have 4 "legs" - pins around this long pin (like minus).
  • #14 17022441
    michalw114
    Level 7  
    Posts: 11
    Rate: 3
    I understand, but I do not have these 4 feet on the computer, does it not matter?

    Added after 8 [minutes]:

    D-SUB No Signal Issue on LG 19M38A-B Monitor with MSI H110M PRO-VD Motherboard
  • #15 17022509
    safbot1st
    Level 43  
    Posts: 21951
    Help: 2719
    Rate: 1583
    Oh lord
    michalw114 wrote:
    Graphics: GeForce GTX 1060

    you were supposed to connect to the graphics card, not to the motherboard, right?
  • #16 17022518
    michalw114
    Level 7  
    Posts: 11
    Rate: 3
    Well, I plugged it in, only the adapter is also a bit wide and I wonder if it is good dolegal.
  • #17 17022570
    safbot1st
    Level 43  
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    As I wrote, you don't have the adapter you need. There should be 4 small pins and 1 large pins for the analog.
    Do not connect to the board, because if there is a GTX, it is turned off there.
    Connect to GTX.
  • #18 17066218
    boxon1337js
    Level 9  
    Posts: 127
    Help: 3
    Rate: 20
    I do not want to say anything but if you have a graphics card, you have a VGA port there, if I wrote it wrong, someone can correct it and connect it, not the PS motherboard. As you have already dealt with this problem, close the topic in advance. Thanks :D
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Topic summary

✨ The discussion revolves around a "D-SUB No Signal" issue experienced with an LG 19M38A-B monitor connected to an MSI H110M PRO-VD motherboard and a GeForce GTX 1060 graphics card. The user confirmed that the computer powers on and works with a TV via HDMI, indicating that the problem lies with the D-SUB connection. Suggestions included checking the type of DVI adapter used, ensuring it supports analog output, and connecting the monitor to a different device to verify its functionality. The user later confirmed that the monitor works with a laptop, leading to further discussions about the necessity of using the correct adapter and connecting directly to the graphics card rather than the motherboard. The conversation concluded with advice to ensure the correct adapter is used for the D-SUB connection.
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FAQ

TL;DR: Fix “D‑SUB No signal” by using the GTX 1060’s output with the correct adapter—“There should be 4 small pins and 1 large pins for the analog.” That means DVI‑I to VGA, not DVI‑D, and don’t plug into the motherboard when a GTX 1060 is installed. [Elektroda, safbot1st, post #17022570]

Why it matters: This FAQ helps LG 19M38A‑B and MSI H110M PRO‑VD owners quickly restore display when using VGA/D‑Sub with a GTX 1060.

Quick Facts

How do I fix “D‑SUB No signal” on an LG 19M38A‑B with a GTX 1060?

Connect the monitor to the GTX 1060, not the motherboard. Use a DVI‑I to VGA adapter that has four pins around the flat blade. If your card only offers DVI‑D, a passive VGA adapter will not work at all. How‑To: 1. Identify the DVI type on the GPU. 2. Use a DVI‑I‑to‑VGA adapter. 3. Power on and select VGA input. [Elektroda, safbot1st, post #17022570]

How can I tell if my DVI port supports VGA via a simple adapter?

Look for four small holes around the flat blade on the DVI port. Those are the analog pins on DVI‑I. “There should be 4 small pins and 1 large pins for the analog.” If those holes are missing, it’s DVI‑D and cannot output VGA. [Elektroda, safbot1st, post #17022406]

Will a D‑Sub (VGA) to HDMI adapter work on a GTX 1060?

Yes, but only if it’s an active HDMI‑to‑VGA converter with electronics inside. Passive HDMI‑to‑VGA plugs will not convert the digital signal. The helper put it plainly: you need the “fluff” with a converter for this path. Verify the monitor works first using a VGA laptop. [Elektroda, safbot1st, post #17022304]

Why does the monitor show “No Signal” even before I connect the PC?

That message is normal when the monitor has power but no valid input. You’ll see “No Signal” with the VGA cable disconnected or attached to an inactive source. Confirm with a known‑good source to isolate the issue. A laptop’s VGA output is ideal for testing. [Elektroda, safbot1st, post #17022251]

Should I plug the LG 19M38A‑B into the MSI H110M PRO‑VD motherboard or the GTX 1060?

Use the GTX 1060’s video outputs. With a discrete GTX installed, the motherboard’s VGA output is disabled by default. Connecting to the board will yield no picture. The fix is simple: move the cable to the graphics card and use the proper adapter. [Elektroda, safbot1st, post #17022570]

How do I test if my VGA cable or monitor is bad?

Connect the LG 19M38A‑B and the same VGA cable to a laptop’s D‑Sub port. If the image appears, the monitor and cable are fine. That confirms the PC side or adapter choice is the cause. This exact test succeeded in the thread. [Elektroda, michalw114, post #17022351]

My GTX 1060 has DVI‑D Dual Link. What adapter do I need for a VGA‑only monitor?

Use an active DVI‑D‑to‑VGA converter. DVI‑D carries only digital signals, so passive VGA adapters cannot work. Before buying, confirm the monitor and VGA cable function using a laptop. Then place the active converter between the GPU and the VGA cable. [Elektroda, safbot1st, post #17022304]

HDMI to my TV works but VGA to the LG 19M38A‑B doesn’t. What does that prove?

It proves the PC boots and the GPU outputs video correctly. The issue lies in the analog path: wrong port, wrong adapter, or missing conversion. Focus on using the GTX’s outputs and the proper DVI‑I adapter or an active converter. [Elektroda, michalw114, post #17019800]

Does the power supply affect a “No Signal” video symptom here?

In this case, no. The system displayed video via HDMI to a TV, so power delivery was adequate. “No Signal” on VGA pointed to signal type and adapter choice. Address the video path first: port selection and proper analog support or conversion. [Elektroda, michalw114, post #17019800]

My DVI‑to‑VGA adapter is wide and won’t seat fully. Is that the problem?

Likely yes. If your GPU’s DVI port lacks the four analog holes, a VGA adapter won’t fit or function. You need an adapter that matches DVI‑I, not DVI‑D. Otherwise, use an active converter from a digital output to VGA. [Elektroda, safbot1st, post #17022570]

Edge case: Can I enable the motherboard’s VGA with a GTX 1060 installed?

By default, the board disables iGPU outputs when a discrete card is present. Expect no image from the motherboard’s VGA in that state. The practical path is to connect the monitor to the GTX 1060 and use correct conversion. [Elektroda, safbot1st, post #17022570]

What’s the simplest 3‑step path to a picture on this combo?

  1. Move the cable to the GTX 1060’s port. 2. If the GPU has DVI‑I, use a DVI‑I‑to‑VGA adapter; if DVI‑D only, use an active converter. 3. Select VGA input on the LG. This sequence fixed the forum case. [Elektroda, safbot1st, post #17022304]
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