HDMI Plug\Connector Issues (RANT)...........

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Janitor Tzap
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HDMI Plug\Connector Issues (RANT)...........

Post by Janitor Tzap » Sun Mar 04, 2018 1:35 pm

I would like to take the person who came up with this design aside and punch them out! :mad:

I keep going back to peoples homes to fix the: TV/Monitors, DVD/Blu-Ray Player/Recorders, and Game systems that use the HDMI Plug\Connectors.

Mostly I replace the Cable.
I found that sometimes you can get the connection to work again.
After you spray contact cleaner in to the plug end of the cable, and working it in, and out of the socket.
But it only lasts for a few months, then I'm back cleaning it again, or just replacing the cable.
ARGH! :mad:


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jwax
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Re: HDMI Plug\Connector Issues (RANT)...........

Post by jwax » Mon Mar 05, 2018 8:02 am

You must be buying the cheap ones.
Here's what you need:
https://www.amazon.com/P568-100-HD-HDMI ... hdmi+cable
:shock:

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Janitor Tzap
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Re: HDMI Plug\Connector Issues (RANT)...........

Post by Janitor Tzap » Mon Mar 05, 2018 8:33 am

jwax wrote:You must be buying the cheap ones.
I wish that was the case. :x

I've tried $10 to $20 dollar shielded HDMI cables for computers, and even those will have the issue with the contacts in the plug & jacks.

I have replaced DVI & the even older SVGA Cables.
But only because the cable was damaged by getting yanked, kinked, or cut.
Never from problems with the pins not making good connections.


No....
The HDMI connector is just a poor design. :(


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dacflyer
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Re: HDMI Plug\Connector Issues (RANT)...........

Post by dacflyer » Mon Mar 05, 2018 9:33 am

have you tried the gold plated ones ? not sure if the ones on the tv or other units, are gold plated or not..i hear that gold never corrodes.

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Re: HDMI Plug\Connector Issues (RANT)...........

Post by Janitor Tzap » Mon Mar 05, 2018 11:39 am

dacflyer wrote:have you tried the gold plated ones ? not sure if the ones on the tv or other units, are gold plated or not..i hear that gold never corrodes.
Yup, still have the issue....
Only it takes longer for the problem to occur.

Another Example:
The sockets on the TV\Monitor may not have Gold plated contacts, or Silver plated contacts{Copper}.
Thus, connectivity will not be the best, when using Gold plated Cables.

Story:
While I worked at a TV/VCR repair shop.
We would get customers bringing in their Nintendo gaming systems, or ATARI Game systems,
complaining that they could no longer play any games on their machine.
9 out of 10 times, it was due too the Edge Card Connector on the Game Cartridge,
and or the Connector in the Video Game System, that would get dirt or tarnish building up on the contacts.

On old Zenith Televisions from the late 1960's to early 1980's.
They had mechanical tuners with Gold Plated Contacts in them.
Yes, the Gold made the tuner more reliable, and it need less cleaning.
But because the tuner wasn't completely sealed, contaminants could get in.
So, it still needed to be cleaned from time to time.



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haklesup
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Re: HDMI Plug\Connector Issues (RANT)...........

Post by haklesup » Mon Mar 05, 2018 1:26 pm

interesting, I have not experienced problems with any HDMI connectors yet but in general, the major failure modes would be

1. surface Contamination causing leakage, opens or shift in impedance
2. Spring memory (contacts get compressed and don't spring back causing opens and series resistance faults
3. Surface plating degradation, either from oxidation or abrasion
4. Failure of internal connections usually in the over-mold where the wires connect to the connector ( in my experience many RCA cables and power connectors fail this way)
5. Failure of the dielectric to maintain impedance, can be mechanical damage or internal contamination. For example, a cable can be bent, kinked or crushed and show little evidence but it can still be fatal to the signal integrity.

cheap cables are made often by cutting cost in the contact's base metal or plating surfaces and sometimes in the grade or gauge or wire inside the cable. Gold is best because it resists oxidation and is mechanically slippery but a flash coating may look good but fail to provide the properties it was intended to. For a while recycled copper with high resistance was blamed for bad motors wasting energy. you would never plate with silver, that would be tin or similar alloy usually

I don't think the HDMI connector design is inherently bad but there are plenty of opportunities for bad components given the high bandwidth of the connection

While I don't recommend the cost of Monster cables, I have had just fine luck with 5", 10', 20' and 50' foot cables I got on ebay, I just observed the comments and rating to guess they had reliable product. Not being a repair person, I won't be exposed to the volume of problems you have.

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Re: HDMI Plug\Connector Issues (RANT)...........

Post by Janitor Tzap » Sun Mar 18, 2018 2:07 pm

Hmmm...............

I came across this on another site.
Image
The person said the gold plated fingers on the RAM stick were rubbing off.
{Thou, too me it looks like they were burned off.}

In any case this is troubling, because CPU's in general draw a lot of current.
And to have this kind of failure to happen, would do a lot of damage to the computer.


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