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Related

RaspberryPi3 powering up but no visual HDMI - VGA

wolfmountaingames
wolfmountaingames over 8 years ago

I recently got a raspberry pi, but all my monitors are VGA so I went to the store got an HDMI to VGA adapter, and plugged in the screen, mouse, keyboard, and finally the pi. The red light came on so the power cord is working, but there was no visual at all it was as if the pi was not on. I read somewhere that in an older version if you changed a line in config.txt that it sometimes help with hdmi to vga, but I can not find config.txt anywhere on the preloaded card I bought. Can someone help me with this or link me to a confirmed working HDMI-VGA adapter that works with the pi?

 

Thanks,

 

Andrew

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  • royleith
    royleith over 8 years ago

    There have been a number of issues reported with failure to get an HDMI image. I have resolved several issues by appropriate lines in /boot/config.txt (edit by using a microSD card reader and text editor in another computer).

     

    This website has the full info.

     

    RPiconfig - eLinux.org

     

    My solutions to blank screens and the incorrect resolution have involved forcing HDMI and setting the required video mode. Here are the relevant lines in my config.txt.

     

    # uncomment this if your display has a black border of unused pixels visible

    # and your display can output without overscan

    disable_overscan=1

     

    # uncomment to increase signal to HDMI, if you have interference, blanking, or

    # no display

    config_hdmi_boost=4

     

    # For 1080p display

    sdtv_mode=2

    sdtv_aspect=3

    hdmi_group=1

    hdmi_mode=16

    If the VGA monitor you are using does not support 1080p then you should refer to the link, above, to find out how to get the supported video modes from the HDMI port.

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  • rew
    rew over 8 years ago

    Hi Andrew,

    I am a bit worried about that SD card you have....

     

    There are two hints that this may be the problem. I don't hear anything from you about the green light flashing a bit when you turn on the pi. The green light should go on and off irregularly for a while after you turn on the pi. If NO green light is seen at all the pi is not seeing the SD card.

     

    Secondly, you say something about not finding config.txt. The SD card should have a boot partition which holds the stuff needed for booting. It is a fat partition that should be visible using Windows. And there you should be able to find "config.txt", simply in the root directory.

     

    (Hmm. I don't know how NOOBS handles booting and if you'd be able to see that config.txt file on a NOOBS card. )

     

    To bluntly answer your question: these work:  HDMI Male to VGA RGB Female HDMI to VGA Video Converter adapter 1080P for PC EJ | eBay

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  • beacon_dave
    beacon_dave over 8 years ago in reply to rew

    On the NOOBS card the config.txt file is packed away inside of the \os\Raspbian\boot.tar.xz archive, presumably awaiting the user to select Raspbian from the NOOBS option list, at which point it is then will be extracted to the boot partition as per the Raspbian image.

     

    Within NOOBS however there are some display options available to the user:

    If your display remains blank, you should select the correct output mode for your display by pressing one of the following number keys on your keyboard:
    1. HDMI mode - this is the default display mode.
    2. HDMI safe mode - select this mode if you are using the HDMI connector and cannot see anything on screen when the Pi has booted.
    3. Composite PAL mode - select either this mode or composite NTSC mode if you are using the composite RCA video connector.
    4. Composite NTSC mode

     

     

     

    Roger Wolff wrote:

     

    ...

     

    (Hmm. I don't know how NOOBS handles booting and if you'd be able to see that config.txt file on a NOOBS card. )

     

    ...

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  • wolfmountaingames
    wolfmountaingames over 8 years ago in reply to rew

    I should have mentioned it, but yes when I first plug the pi in I do see a green light flash on and off for a few seconds and then it stops.

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  • wolfmountaingames
    wolfmountaingames over 8 years ago in reply to beacon_dave

    These are the files I see on root: https://screenshot.net/ryrcddl   I have found the boot.tar.xz archive where you said it would be, when I opened it  and opened boot.tar and config.txt was inside now to test out the uncommenting image

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  • slashthedragon
    slashthedragon over 8 years ago

    Here is how I would troubleshoot. Not necessarily in this order.

    Is the RPi running? The red light should be on and the green light should be flashing.

    HDMI adapter. Plug something else into the adapter.

    RPi running. Does the RPi show up on your router. Unplug HDMI first.

    Connect to RCA display. The audio jack has a video output. Use the cable with an 1/8 plug  and extra ring.

    SSH to the RPi. Get the Rpi IP address from your router.  Then in your PC terminal type SSH pi@[IP address like  192.168.1.6] .

    Use network cable and PC. Plug an ordinary network cable from your Rpi to your PC. In your PC terminal type IP neighbor. You should get the IP address from you Rpi. Follow the steps above.

    I hope that helps.

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  • pkps1968
    pkps1968 over 8 years ago in reply to royleith

    Hi..

    But he is unable to see the config.txt file...

    I am also facing same issue... Not yet resolved...

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  • wolfmountaingames
    wolfmountaingames over 8 years ago in reply to pkps1968

    I found the config.txt file it is inside the boot.tar.tz archive like @Dave_Ingles said(this is kinda like a zip file) you need to open it with something like 7-zip modify the config.txt file through this process.

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  • pkps1968
    pkps1968 over 8 years ago in reply to slashthedragon

    Hi Denis..

    what should I do, if I am not at all seeing the Green LED blinking...?

    I also facing same problem...

    One moe question.. what will happen if I switch ON the RPi without putting the SD Card...?

    waiting for your help..

    curtisRaspberryPi3 powering up but no visual HDMI - VGA

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  • pkps1968
    pkps1968 over 8 years ago in reply to rew

    Hi.. Roger...

    I am also facing same problem...

    I can see only red LED  No Green LED not even blinking...

    What should i do...?

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