Raspberry Pi HDMI problems re. power supplies

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  • japlytic
    Badcaps Legend
    • Oct 2005
    • 2086
    • Australia
    #1

    Raspberry Pi HDMI problems re. power supplies

    On a Raspberry Pi 3, I had a problem with a particular power supply (5V 3A - IC controller, all caps changed) which there is disk activity but no HDMI output; when I disconnected the Micro USB power cable and reconnected it with the power supply on, the problem did not occur.
    So I made a simple power-on delay switch (555 based) which turns on after about two seconds after the power supply starts up so I can avoid this problem in my particular installation.
    My first choice in quality Japanese electrolytics is Nippon Chemi-Con, which has been in business since 1931... the quality of electronics is dependent on the quality of the electrolytics.
    Tags: None
    • Mad_Professor
      A Mech Warrior
      • Feb 2011
      • 1587
      #2
      Re: Raspberry Pi HDMI problems re. power supplies

      Have you tried adding
      Code:
      hdmi_force_hotplug=1
      or
      Code:
      hdmi_drive=2
      to the config.txt?

        Comment

        • japlytic
          Badcaps Legend
          • Oct 2005
          • 2086
          • Australia
          #3
          Re: Raspberry Pi HDMI problems re. power supplies

          I tried chaning the HDMI drive parameter but not the hot plug option.
          My first choice in quality Japanese electrolytics is Nippon Chemi-Con, which has been in business since 1931... the quality of electronics is dependent on the quality of the electrolytics.

            Comment

            • japlytic
              Badcaps Legend
              • Oct 2005
              • 2086
              • Australia
              #4
              Re: Raspberry Pi HDMI problems re. power supplies

              Originally posted by Mad_Professor
              Have you tried adding
              Code:
              hdmi_force_hotplug=1
              or
              Code:
              hdmi_drive=2
              to the config.txt?
              I have changed the hotplug option and is OK without the need to delay the DC.
              My first choice in quality Japanese electrolytics is Nippon Chemi-Con, which has been in business since 1931... the quality of electronics is dependent on the quality of the electrolytics.

                Comment

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