HDMI splitter backfeeds +5V into source

japlytic

Badcaps Legend

Join Date: Oct 2005

Posts: 2081

Country: Australia
#1

HDMI splitter backfeeds +5V into source

10-28-2017, 05:55 AM

On a Raspberry Pi 3, I had a problem where the Pi would not start properly when +5V is connected through its usual Micro USB connector, which I traced to a externally powered HDMI splitter (duplicates one source into two or more displays) backfeeding its +5V supply into the Pi HDMI connector +5V line (which has an electronic circuit breaker).
I carefully broke the +5V trace at the Input connector of the splitter (which was directly connected to the +5V DC input) and the problem was fixed.

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
Th3_uN1Qu3

Believe in

Join Date: Jul 2010

Posts: 6030

Country: Romania
#2

10-31-2017, 04:58 AM

Re: HDMI splitter backfeeds +5V into source

I have here a powered USB hub which has the power adapter input in parallel with the +5V coming from the cable used to connect it to the computer.

Originally posted by PeteS in CA

Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.

A working TV? How boring!
Comment

Announcement