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Raspberry Pi Model B HDMI issue

robobosan

HI, I have a Raspberry Pi Model below with some issue on the HDMI. I followed the troubleshooting steps, but with no luck. It's still not displaying anything on the screen.
The hdmi cable seems to be fine, i tried connecting it with a different device and that worked.

Look like there is something wrong with the raspberry pi/hdmi port on the device. Is it?


Below is the troubleshooting step:

http://elinux.org/R-Pi_Troubleshooting#No_HDMI_output_at_all


Thanks!

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  • That troubleshooting should help you if you follow it all. What bits did you do?

    Is your RPi running if you access using SSH for a terminal? Can you get it to output via composite video?

    How are you editing config.txt? Can you post a copy of the file for us to see?

     

    My own experience is that if the TV/monitor is modern, known to be working and has the right input selected then the most common cause is the HDMI cable not plugging into the RPi properly - this is a frequent problem if the RPi is in a case, as many cases tend to obstruct the HDMI socket just enough to stop it connecting (but you think it's plugged in OK). If RPi doesn't find an HDMI monitor during boot, it stops looking thereafter so pushing the plug later will not work. If in any doubt, take the RPi out of the case while you test

  • in reply to Former Member

    Hi, i took the RPi out of the case and booted it up. At first it looked like it was working but then it started to flicker constantly.
    Check this video: https://www.dropbox.com/sh/15pn6wi1q2nnd4y/AACSHsizY7tpYOoKEpnerK6Pa?dl=0

    I was able to start the (default) OS installation, but the screen just went black after a while; with a message displaying "Check Video Cable". (screenshot)
    Now when i turn it on, i only get the message "Check Video Cable", the flickering stopped.

    This is what i have for my config file:
    config_hdmi_boost=4
    hdmi_force_hotplug=1
    hdmi_safe=1

  • in reply to robobosan

    Did you check +5V voltage level between TP1 and TP2?  I'm the guy who added the low voltage cause to the RasPi Troubleshooting Wiki.  When I was first powering my Model B my power supply had an iffy connection, and whenever the voltage dropped below a certain level (I'd have to look it up) my monitor would first show random green dots and then blank out totally.  It would depend on what RasPi was doing.  Sometimes it worked fine until I did something compute-intensive like compiling, and then return to normal after the compiling ended.  The +5V voltage wasn't low enough to affect anything else.

     

    Nowadays I back-power RasPi from a Motorola Atrix Lapdock using a very short USB cable, so I get nearly 5V at TP1-TP2.

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  • in reply to robobosan

    Did you check +5V voltage level between TP1 and TP2?  I'm the guy who added the low voltage cause to the RasPi Troubleshooting Wiki.  When I was first powering my Model B my power supply had an iffy connection, and whenever the voltage dropped below a certain level (I'd have to look it up) my monitor would first show random green dots and then blank out totally.  It would depend on what RasPi was doing.  Sometimes it worked fine until I did something compute-intensive like compiling, and then return to normal after the compiling ended.  The +5V voltage wasn't low enough to affect anything else.

     

    Nowadays I back-power RasPi from a Motorola Atrix Lapdock using a very short USB cable, so I get nearly 5V at TP1-TP2.

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