Comments on: +5V voltage feed on HDMI cables and a failing HDMI2AV converter https://billauer.se/blog/2017/12/hdmi-dvi-cable-hdmi2av/ Anything I found worthy to write down. Thu, 26 Mar 2026 13:15:15 +0000 hourly 1 http://wordpress.org/?v=3.1.2 By: Earl https://billauer.se/blog/2017/12/hdmi-dvi-cable-hdmi2av/comment-page-1/#comment-1427 Earl Thu, 20 Jun 2019 22:17:19 +0000 https://billauer.se/blog/?p=5329#comment-1427 Interesting. I have recently seen this with Raspberry Pi 3 devices that will not boot if there is 5V on the HDMI cable from a source other than the Pi. The Pi 3 outputs 5V and I have run in to two monitors that supply 5V on pin 18. You can boot the Pi with the HDMI cable unplugged - The Pi will even keep running if you unplug the Pi power supply, getting enough power from the monitor 5V supply. Couple this with 3.3 V regulator failures on the new Raspberry Pi 3 b+ for some real confusion! Using a very useful HDMI breakout from belon67 on eBay. Interesting. I have recently seen this with Raspberry Pi 3 devices that will not boot if there is 5V on the HDMI cable from a source other than the Pi. The Pi 3 outputs 5V and I have run in to two monitors that supply 5V on pin 18. You can boot the Pi with the HDMI cable unplugged – The Pi will even keep running if you unplug the Pi power supply, getting enough power from the monitor 5V supply.
Couple this with 3.3 V regulator failures on the new Raspberry Pi 3 b+ for some real confusion!

Using a very useful HDMI breakout from belon67 on eBay.

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