Thanks Alan, I thought that would be necessary. I had hoped to be able to contact directly the guy who started this post, as he had the exact same tv and my symptoms are exactly the same. I really wanted to have replacement part to hand, so I could take the backplate off and repair it all in one hit. I will do as you suggested, I guess that is the best way of getting the correct part anyway.

Mike...

Hello everyone,
My name is Mike, I live in Oxfordshire, England in the UK and am retired.
I have worked on computer hardware for many years and have just been given a rather nice but not working, Panasonic 4K tv.
I came on here following a link to somebody who has the same TV problems posted on here as I appear to have and have gratefully followed the help he received to complete the repair. I still need to find an LED Back light Strip for a Panasonic TX-40AX630B, so if anyone can advise me of any substitute LED Strips of of any strips I can use LEDs from for Stacking, then...

Hi, I am new to the site and came on here as have exact same TV and problem you had and also have one LED rail outputting only 3.1v, same as you. I had already replaced the A board when I found your posts and would be most grateful if you can advise me what type of LED strip I should buy to fix it with please. I cannot obtain the correct LED Strip to just replace, so will need to Stack as you did. I would like to buy a strip before I pull the back off and would greatly appreciate you telling me what one I should buy, or will any strip from a Panasonic TX TV have the correct LEDs? Thanks for any...