Repair a Hdmi Cable





Introduction: Repair a Hdmi Cable

Alright, here is the situation: you just installed a 5 meter Hdmi cable in the walls of your office. (or home) Then you come to the discovery that someone stepped on the Hdmi connector. Connector kaput....  What can you do?

- Well there is the option of breaking open the wall and replace the Hdmi cable. NOT... 
- Or pulling a new cable through the walls with the old one but this situation involves a corner,
  which makes that option impossible as well.

- Then there is the "getting a new connector and solder it on cable" option, unfortunately I could not find someone who did this before.

So here is my motivation to share my experience with you since this is my second time that I have done this....
Here goes....

Step 1: Tools You Need

This is what you need:
(give or take)

- Solder Iron
- Solder
- Desolder wire
- Second Hdmi cable (optional)
- Hdmi to hdmi connector (optional)
- Hdmi connector
- Tyraps
- Sissors
- Extra power cables
- Multi meter
- Aluminium  (optional)
- Crocodile clamp assist (thing)

2/3 hours...
Some soldering experience...

Step 2: Wiring It All...

First we need to know which connection is going where, since both Hdmi internal connections are the same (no twisted wires or anything like ethernet patch cables) the pinout is very straight forward.
1 is going to 1
2 to 2
3 to 3

But ones the cable is cut you cannot measure which wire comes from which pin, so I used a multimeter to check which wire belongs to which pin. I used a little wire to make a connection with the end that was still working, the front of the Hdmi connector has little holes where you can push the test-wire into. (see photo) Thats the way to make contact with that end. (I used some tape to hold it in place, not professional but it works.

Next photo is the setup, I set my multimeter for 20K since I dont a have beeper mode on it.
It will only show that there is practically no resistance when you hit the right wire. (0,00)

You can use a wire diagram but I found out that many dont seem to be the same or are not the same as my Hdmi cable, so I recommend using this procedure because it should always be right!

Step 3: Start

Next: Peel of 2 cm from the cable and get some room between the wires....
As you can see we have a few wires (for display detection, 5 volt power, clock speed and data) in beautiful colors.
And 4x 2 pairs of wires in a colorfull metal shield, these are the data wires for the picture and sound.

Before you begin, slide the first part from the connector on, its a common mistake to have the connector in place and then realise that you needed to slide that one on first. Then strip down the metal shields of the wire pairs so they will be exposed, next remove about 3mm of the inner wires so the core will be exposed. (do this with all wires)

I used sissors to strip the cables but you can use any tool you like to strip the cable.

Next: try to line up the first pair of wires to the connector, first measure which one you need with the multimeter and then align them up to the connector. I used my crocodile clamp assist to keep things straight. (I used tape to protect the cable from the crocodile clamp)

Step 4: Soldering...

First I did some solder on the contacts and on the wires.
After that you can hold them together and push them in place while heating the contact on the connector..
The 25 watt soldering iron was more then enough, (maybe to much) for the job...

Work from left to right (or right to left)
If you dont you could end up like photo 3, with to much sodler it will touch the contact next to it and change into one big solid lump.
This can be corrected by using desolder wire...

After a a few wires you could be in for a suprice, some of the wires can bearly make it to the contacts.
(going through all the other wires) This should not be a really big problem, just try to place the wires in the shortest way from cable to connector...

And done, I was left with two ground wires, which I cut off. The other end shoud still be connected to ground so that doesnt really matter. (I hope)

Step 5: Some Extra Precaution...

After searching on the internet for a Hdmi connector I found out that there wasnt anything with a cable strain relief.
Iam not sure why but do they think that 15 small wires are going to hold out?
I replaced another connector two months back because it malfunctioned after working for two months...

And for some reason my cable is a lot thinner then the exit hole in the back of the connector (of course there are many types of Hdmi cables out there but you would think they thought of that when they designed this connector) Not sure what to think of this...

And tata...  a fully functional connector, but we are not there yet...
Test one more time ALL connections to make sure you do not have any wires twisted or connected wrong.
You dont wanna blow the Hdmi connections on your computer or television.

Some additions:
I took some precaution and ordered a Hdmi to Hdmi connector and another 3 meter Hdmi cable.
The idea is that when the cables breaks down (again) the only thing you have to replace is the 3 Meter cable (which saves you a lot of trouble)

To hold it all together I used some tytrips and a alumilium strip.

Step 6:

Then we put the hole assembly into the wall, since the walls are hollow we have enough room to put it all in there without bending anything.
After closing it all up there is nothing to be seen, but if this cable breaks we can connect a new Hdmi cable within 10 minutes.  

And there you go, running a signal through a 5 meter long cable with a self-soldered connector, then through a Hdmi to Hdmi connector and then another 3 meters to the Imac with converter.
I tested it with a 1080P trailer and there was no scrambeld or strange picture to be seen, proves that Hdmi is a good and solid protocol.

Way to go Hdmi...

Bytheway a nice tip that I've got from from c0lin was to get one of these:

And I have seen comments about using glue as a strain relief, I have something to say about it: DONT DO IT!
It didnt work with any glue I used (including hot glue) and I ended up doing al this a second time.
The cable itself and the connectors are so smooth that any glue you would use has trouble sticking on to it.
That is why I left it out and used the aluminium and Tyraps approach.

For more tips (untested) look at the comments below (first page)



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    Probably not available at time this was posted, but now pick up an HDMI Breakout Board with terminal blocks and there is no soldering required. Simply map your wires, attach via the terminal blocks, and test. Easy to correct mistakes as well.



    I wonder if it would be easier and possible to just cut the end off a good hdmi cable and splice it together with my cabke that needs a new connector. Seems like it would be easier and would solve the strain relief problem.

    Thanks for the work |!!

    Hi I'm looking for someone in the Maidstone, Kent area who can do this for me, any suggestions please.

    Sorry, I am not even living the same country... :( Think there are some companies who do that though)

    Just want to say a big thank you for these instructions! I signed up to instructables to share my experience after following your instructions. My in wall HDMI cable was damaged at the end. Your instructions were great and I followed everything exactly. In the end, I got a working hdmi cable again! Didn't like the unappealing technique of joining two cut ends of different hdmi cables together, especially when I couldn't find the exact same cable. I did purchase the hdmi connector from Conrad: alternatives are very hard to find, but they do charge a fortune to send outside UK/Europe.

    I found the helping hands/rig vital to keep things still while soldering. I used 60/40 solder and a fine tip soldering iron - around 30w was sufficient. The desolder wire was very useful.

    Your tips about applying some solder on the contacts was good, and also tinned some the tips. I used the solder with one hand and the other hand, I used a pair of tweezers to hold the wire in place. Tweezers were very helpful. I would directly apply the solder tip to the wire and it would solder on nice and neat. It was getting tight with some of the wires to reach the contacts, sometimes I had to slightly pull, but also thread the wires around others to minimise the distance - tweezers were very helpful. I guess prevention is the key, and keeping all wires the same length, and stripping them consistently is vital.

    To identify which color wires goes to which end, I used the cut end of the broken hdmi connector, and stripped the end of the broken wires. I then used the multimeter to confirm which wire went to which contact (often the wires are hard to distinguish).

    I connected all the data shield wires and even grounded the outer foil cover to the hdmi connector ( just copied the broken end hdmi connector )

    I used the glue gun to insulate all the wires, very useful as I didn't strip the wires very evenly, and risk having the wires contact. Very good tip.

    I will use the female-female hdmi connector and extra hdmi connector to prevent fiddling around with the new head connector I added.

    Many thanks again for the clear instructions

    Hi Mboy1,

    Thank you so much for your comment on this.
    I am happy you we're able to fix your HDMI cable using these instructions, that is the biggest reason I put them up here.
    Also thank you for your detailed email here, I usually don't get so much feedback on this.
    Sorry for responding so late but I really do appreciate your comment.

    Happy TV watching, with regards, Ewout...

    Hi, just wanted to say thank you for the simple and yet illustrated instructions.


    But ones the cable is cut

    But once the cable is cut

    really helpful instructions! I'm going to try it my self next week. There's just one part I don't get.. When you measure the resistance "to know which Connection is going where", where do you place the other end of the multimeter? You place one end with the small test wire connected to the working end of the cable, but what about the other end? How do you close the circuit? Feels like I'm missing something here...