TCL L65F3500FDS issues - Tcon, panel, or ?

[skkunx]

Re: TCL L65F3500FDS issues - Tcon, panel, or ?

Yes I realise that

lesson's learned....

[Andrew F. Ali]

Re: TCL L65F3500FDS issues - Tcon, panel, or ?

You bought the wrong board. The number you should have quoted when ordered was: the number on the white paper label and NOT the number on the board.

[skkunx]

Re: TCL L65F3500FDS issues - Tcon, panel, or ?

Replacement came in. I installed it only to realise it was missing a connection (see picture, top right of each board). Not ldvs, but not sure what its function is.

Anyways. Plugged everything else in and flicked it on. Problems has changed but it all still seems pretty fucked.

Soooo I'm selling it off to the next person who wants to have a go. Thanks for all the replies in here, maybe one day I'll return to the tv repair game, but for now I'm gonna do it the easy way and just buy used

[budwich]

Re: TCL L65F3500FDS issues - Tcon, panel, or ?

ok but the half. that wasn't white.... what did the picture show? feed in a good test pattetn (ie. color bars) and look carefully at the result. go from there.

[skkunx]

Re: TCL L65F3500FDS issues - Tcon, panel, or ?

when you say "unplugging the tcon board resulted in a crisp white screen with no distortion" ... did you mean "totally" as in both tcon to panel cables at the same time.... or just one of them?

Well yes, unplugging both would turn the entire screen white; but unplugging either the L or the R cable, by itself, would result in just that half going white.

[budwich]

Re: TCL L65F3500FDS issues - Tcon, panel, or ?

I've ordered the replacement tcon board from the US, so this thread will likely be on hold for a few weeks.

I have reassembled the tv for now, but I can say that unplugging the tcon board resulted in a crisp white screen with no distortion. I never saw any colour tests but I didn't unplug the ldvs for very long

when you say "unplugging the tcon board resulted in a crisp white screen with no distortion" ... did you mean "totally" as in both tcon to panel cables at the same time.... or just one of them?

[skkunx]

Re: TCL L65F3500FDS issues - Tcon, panel, or ?

In this thread: https://www.badcaps.net/forum/showthread.php?t=66084 ,
you can see that what it seems a tcon problem (screen divided into 2) is in fact a mainb. one, you can do the test of that user, unplug the tcon lvds cable and see if a self test appears.. Anyway if you say that dismounting the screen bezel and touching screen tabs makes big difference in the video then is a screen problem..

Touching the tabs did nothing. Fingers crossed is the tcon board. Will update in a few weeks once the replacement arrives. Thanks to everyone who has replied

[skkunx]

Re: TCL L65F3500FDS issues - Tcon, panel, or ?

I've ordered the replacement tcon board from the US, so this thread will likely be on hold for a few weeks.

I have reassembled the tv for now, but I can say that unplugging the tcon board resulted in a crisp white screen with no distortion. I never saw any colour tests but I didn't unplug the ldvs for very long

[Davi.p]

Re: TCL L65F3500FDS issues - Tcon, panel, or ?

In this thread: https://www.badcaps.net/forum/showthread.php?t=66084 ,
you can see that what it seems a tcon problem (screen divided into 2) is in fact a mainb. one, you can do the test of that user, unplug the tcon lvds cable and see if a self test appears.. Anyway if you say that dismounting the screen bezel and touching screen tabs makes big difference in the video then is a screen problem..

[Davi.p]

Re: TCL L65F3500FDS issues - Tcon, panel, or ?

Then.. forget what i've said on the defect, i'm not sure on which is this one, not so common, but i suspect also to be the mainboard. If i have time i can search the forum for an old thread where i have seen something maybe interesting. At first sight it seems a tcon/panel problem but on some newer design how is, how don't is, it can be the mainboard, please first check inside which is the producer of the mainboard and also the main chip of the mainboard... see you later..

[maxvalutech]

Re: TCL L65F3500FDS issues - Tcon, panel, or ?

I buy very few parts here in Oz as asking prices are ridiculous. I'm now quite used to waiting 4 - 6 weeks for delivery of parts sourced overseas. With a big set just store it under a bed or wherever while you wait.

[skkunx]

Re: TCL L65F3500FDS issues - Tcon, panel, or ?

That's tcon failure! Look at the sharp I replaced the tcon on the other night. Now after the tcon replacement it flickers every once in a while which I believe may be panel failure ( side gate tabs)

I believe the bad gate drivers probably took out the original tcon

Motivating me to just replace the board.

If I was in the US, it would cost me next to nothing, and take me all of a week to order, receive, and swap it in. Stupid Australia.

[freakaftr8]

Re: TCL L65F3500FDS issues - Tcon, panel, or ?

That's tcon failure! Look at the sharp I replaced the tcon on the other night. Now after the tcon replacement it flickers every once in a while which I believe may be panel failure ( side gate tabs)

I believe the bad gate drivers probably took out the original tcon

[skkunx]

Re: TCL L65F3500FDS issues - Tcon, panel, or ?

Yes, I recognize that I bit off more than I can chew; and I don't have the capacity/patience to test every little connection. I am going to just try to sell as is.. and if i get no offers then I will make a further decision to either harvest for parts, or buy the Tcon board and hope for the best.

This gif more clearly shows the problem(s).


again, using the highly accurate manual wiggling/prodding technique:
-movement at the panel edge tabs does nothing
-wiggling the ribbon cables at the connections changes and erases the display issues, but never to a point where the whole display is in perfect working order.

[Davi.p]

Re: TCL L65F3500FDS issues - Tcon, panel, or ?

Also different models are different weights, i have on 40" that weights much more than a 50" and both are last generation sets.. Handling a 60" Sony by myself was a pain...

[maxvalutech]

Re: TCL L65F3500FDS issues - Tcon, panel, or ?

Yes Davi.p I haven't had one that size to work on as yet but they are coming!! First 50" I got managed to drop it and break screen. Here in OZ the shops tell me everyone wants the big sets now 65" - 75" and are putting the little 50" in the bedroom!! Talking Aus dollars about 75c US.

[Davi.p]

Re: TCL L65F3500FDS issues - Tcon, panel, or ?

But 65" is a damn giant tv, it joins unconfortable handling and difficult tech aspects.. apart that i don't know which dollars are 100$, US or AU..
I feel frustrated many times trying to fix TVs and i'm on this field since 6-7 years, i think one novice which obstacles meets on the way, if it has not passed the "mess tin".

[maxvalutech]

Re: TCL L65F3500FDS issues - Tcon, panel, or ?

Davi.p on pure economics is right but there is more to it than that. You have expended $100 but in worst case could probably recover that from sale of boards and remote if you got one with it. In for a penny in for a pound is the old saying but don't throw money at the set. Your tcon board is in many makes of set BUT the white sticker has a part number which good sellers will quote. Prices I've seen are from $20 but watch postage costs. I've had parts from Poland, UK, US, but mainly China Hong Kong (which is where the board is made). However, again Davi.p is probably on the right track and you need to do the testing and fiddling first. People spend time and money on various pursuits e.g. how much for a game of golf ? which can be just as frustrating ! For myself I'm just trying to keep the old brain active and I find that with sale of sets I do fix that at worst I break even.

[Davi.p]

Re: TCL L65F3500FDS issues - Tcon, panel, or ?

Getting a giant broken tv and spending money, time and space with no knowledge is crazy, one have to begin with no price monitors, then move to small tv, then bigger ones...
From your animated gif is not possible to understand the problem, too poor... but if my english works a bit and from your description leave to stay the option to waste money on a TCON board, much probably you have broken traces on a panel's tab bond, you could fix it with a flyng wire soldered between horizontal tab and side tab, but is a very difficult task, if you want check my thread about Sony KDL-60ex700, that may be the same problem.. you can also have the luck to fix with a shim on the tab..

[maxvalutech]

Re: TCL L65F3500FDS issues - Tcon, panel, or ?

Getting there. The screws should all be put firmly back into the tcon as they act as earth points. The lead to con1 needs to be closely examined for any damage and correct fitting. Looks like the gamma points are marked but would like someone more experienced to add comment and point you to how to measure. Keep at it.