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No display on monitor(s)

Racine -  
epango Posted messages 37195 Registration date   Status Member Last intervention   -

Hello,

I come to you for a problem that makes less and less sense over time.

I have a Windows 11 desktop with 4 RAM sticks, two GPUs (NVIDIA GTX 1060 & RTX 3060 Ti), an Intel i5 processor, all mounted on an Asus motherboard (I unfortunately don't have the exact reference at the moment).

The basic problem: the PC starts normally, the monitor (Philips screen) does too, but I have no display (no video input, switching to sleep mode). The graphics cards are recognized: the fans spin on startup and then stop to stay passive.

From there, I tried everything: disassembling and checking the GPU ports on the motherboard and on both graphics cards, nothing to report. Disassembling and checking the RAM sticks and their slots: one stick out of four is damaged, but apparently nothing that should hinder the machine's operation. After that, I changed the position of the RAM sticks (from 1010 to 0101), nothing changed. I also tested the three HDMI ports available on my tower (one port on each GPU and the motherboard port), nothing changed.

Then I tested my monitor by connecting a Nintendo Switch to its dock via HDMI: I have a display, nothing abnormal, everything works. I reconnect it to my tower: no display.

I also tested by changing the HDMI cable: still no display. Unfortunately, I don't have a VGA or DVI cable available for further testing.

I then decided to take it to a professional repair shop, and that's where the bullshit begins. The repairman connects my tower via HDMI to one of his personal monitors: he gets a display!! It works!! So we think maybe it was a loose connection, something like that... Back home, I reinstall my tower, and when I turn it on: no display, no change...

I then try changing the power connections of my monitor and my tower, trying different wall sockets (not on power strips): nothing changes, no display.

I get back in touch with the professional who handled my tower, and he sees only one explanation: a problem with my monitor.

I then get a loan monitor to perform tests: nothing. changes. Still no display... Even when connecting and disconnecting the monitors one after the other, with both connected at the same time, nothing works...

So here I am, with a problem that makes no sense, perfectly functional equipment that apparently has no reason not to work, and I'm in a complete dead end...

If one or more kind souls can help, I am open to all solutions and advice.

Thank you for taking the time to read and thank you in advance for your responses.

​


3 answers

  1.
    jeannets Posted messages 28395 Registration date   Status Contributor Last intervention   Ambassadeur 6 603
     

    Hello,

    In cases of somewhat difficult troubleshooting, to have more certainty, you need to practice "Double swapping."

    For example, swap the monitor onto another PC, but don't stop there; you also need to take the monitor from the other PC and install it on yours.

    This is also true for RAM (depending on the specifications).

    In principle, double swaps are done with identical equipment... with the same parameters.

    For instance, you might not have any display... because the PC's graphics card is set to a refresh rate that your monitor doesn't support...

    The reference of your motherboard and monitor are essential in this kind of investigation... and even the model of the processor.

    Has this monitor ever worked with this PC, the same cards, and the same version of Windows... at least once?

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    1. quentin2121 Posted messages 9063 Registration date   Status Member Last intervention   1 312
       

      Hello

      As Jeannets said, whom I greet, we should at least have the make of the repair technician's monitor. Because he was displaying something on your tower.

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  2. paul
     

    Hello

    2 graphics cards. At the same time?

    The repairman is a pro, we don’t know how he started the PC, whether it was with the Windows OS. Or from the BIOS that he could display. Or with a Linux on a USB stick. He could have chosen a screen that supports anything, we don’t know which port he used for the display. He had the PC in his hands.

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  3. epango Posted messages 37195 Registration date   Status Member Last intervention   Ambassadeur 4 270
     

    Why do you want to use 2 GPUs, a GTX 1060 and an RTX 3060 Ti, when the RTX 3060 Ti should be sufficient? You don't mention your motherboard; do you connect your screen to one of the GPUs or to the motherboard?

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