T-con suspect issue. Both ribbon cables no picture. One ribbon cable ok. (58pus8545)

[Tr0ll]

Hi guys! I realized you have a lot of knowledge here so i am hoping you could point me in right direction with my odd issue.

The Tv is a Philips 58PUS8545/12, it had no picture but working backlights.

Original T-con:
Opened the Tv and tested to unplug one ribbon cable at a time. With this test i could see that i got fine picture on both halves as long as there was only one ribbon cable connected, with two connected picture were gone.

First replacement T-con:

I thought it might be t-con and ordered new t-con from china(supposedly tested) and mounted this. This worked totally fine first day. 2nd day i got some horisontal lines(just a few which went on left side but also a small part over to right side of screen but not to the end of screen)

Was a bit dissapointed picture was not perfect but settled with the thought that those few lines was not an issue. After one more week i was back to square 1 except that this t-con with ribbon cable test gave following result:

Unplugging One side showed picture fine
Unplugging other side, distorted picture with typically t-con distortion issue.

were thinking it might actually be a bad replacement t-con and ordered another one from another seller.

Second replacement T-con:


Gives exactly the same issue as the first one, two ribbon cables= no picture

One ribbon cable= picture on half of the screen.

A small difference from original t-con though, there was also some minor distortion in picture on the half that was working.

Am i really unlucky with the t-con replacement cards from china or, is this some strange panel issue anyways? (my logic outruled that as the first card gave perfect pictures on 50% of screen with one ribbon cable unplugged)


Sorry for this bible of text, but what do you guys think?
it is so frustrating as it worked "fine" for almost two weeks after first replacement of the T-con.

Thanks in advance =)
BR

(edit i tried to google my brainz out and found some similar issues reported but never found any solution/conclusions)

[nomoresonys]

Re: T-con suspect issue. Both ribbon cables no picture. One ribbon cable ok. (58pus85

Maybe try cleaning the 2 tcon ribbon cable pins with ipa, some use pencil eraser, not too vigorously they can be fragile, inspect and make sure none of the pins are damaged and make sure the lvds cable is clean and secure at the tcon.

[nomoresonys]

Re: T-con suspect issue. Both ribbon cables no picture. One ribbon cable ok. (58pus85

Have a strange idea, with that first replacement tcon in tv, try the "tape cutoff" method, can look it up in search or on youtube.

[nomoresonys]

Re: T-con suspect issue. Both ribbon cables no picture. One ribbon cable ok. (58pus85

Example there, he managed to get it down to one line but sometimes you need to cover more, might not be your problem, don't know, it is strange that the replacement worked for a whole day then no good next day: https://www.youtube.com/watch?v=pfrRhw7-ZII

[nomoresonys]

Re: T-con suspect issue. Both ribbon cables no picture. One ribbon cable ok. (58pus85

Suppose it could be a short from panel taking out the tcons but the original tcon seems to be ok.

[Tr0ll]

Re: T-con suspect issue. Both ribbon cables no picture. One ribbon cable ok. (58pus85

Maybe try cleaning the 2 tcon ribbon cable pins with ipa, some use pencil eraser, not too vigorously they can be fragile, inspect and make sure none of the pins are damaged and make sure the lvds cable is clean and secure at the tcon.

So appreciated with your feedback, thanks!

I tried to run a rubber over all the pins without luck. Did only use my eyes to check and i see poorly so maybe i will try zoom/photo with my phone and post here for you to see?

But my logic are saying it is no errors with the ribbon cables as they work independently? Maybe LDVS when both signals is passing through? What do you think about my reasoning here? This is the first time i am trying to repair a TV after some Youtube schooling.... so bear with me if I am not following all logic here. I have a multimeter somewhere... but knowledge how to use it... not yet at least...

Not sure if the tape-off method will work here, as i understand that would probably be an idea if i got picture with both cables but ended up with picture with horisontal lines?

[Diah]

Re: T-con suspect issue. Both ribbon cables no picture. One ribbon cable ok. (58pus85

put back yours original t-con, search for firmware in name upgrade_loader.pkg on usb stick formatted in fat32 mbr mode and do upgrade or downgrade.... the screen will work again hopefully

[Tr0ll]

Re: T-con suspect issue. Both ribbon cables no picture. One ribbon cable ok. (58pus85

put back yours original t-con, search for firmware in name upgrade_loader.pkg on usb stick formatted in fat32 mbr mode and do upgrade or downgrade.... the screen will work again hopefully

Thanks for you answer.
can you explain a bit more or point me to another thread with this info?
When Tv was operated i checked firmware from settings and there was no available updates.

[Diah]

Re: T-con suspect issue. Both ribbon cables no picture. One ribbon cable ok. (58pus85

yours TV chassis TPM191E Android , if its from 2020 then need only choice firmware from this year.. so downgrade to this ( PM191E _ 101.001.037.004 – Date: 2020/06/15 (Upgrade_Loader )

look here to download only upgrade_loader firmware..
search google or here i did wrote how to format usb Stick as FAT32 in MBR mode....
notice the usb must be in MBR then TV will response to it at startup

[Tr0ll]

Re: T-con suspect issue. Both ribbon cables no picture. One ribbon cable ok. (58pus85

Thanks a bunch! But can you tell me any more about the back-ground for this? Tv are fully updated, is that the issue? And need to back to software from 2020? How come...?

(edit: if this method works, should i stay away from updating again?

edit2: Sorry if i am a bit dumbstruck here, just wanting to make sure, really appreciates all suggestions here and i will surely test it)

[Diah]

Re: T-con suspect issue. Both ribbon cables no picture. One ribbon cable ok. (58pus85

after reading yours first post again... don't do it with your original T-CON... put the replacement one in order the firmware will match version on with replacement one... as you said you have already the last version.... but yours T-CON maybe older... this conflict could be solved with downgrade...
however its known issue at Philips Android TVs, Part of main firmware buffer (MFC ) glitch out. tv work fine BL -- ampilight and sound too.. but screen black..

[lotas]

Re: T-con suspect issue. Both ribbon cables no picture. One ribbon cable ok. (58pus85

yours TV chassis TPM191E Android

The chassis of this TV is "TPM20.1E LA".

[Diah]

(58pus85

The chassis of this TV is "TPM20.1E LA".

please look on the trusted page of Philips, and search after the NO he posted 8545
between we discussed this before... you link for HW and my for FW

[Tr0ll]

Re: T-con suspect issue. Both ribbon cables no picture. One ribbon cable ok. (58pus85

Did a new test on the different T-cons now with following result:

Replacement card 1 (this was the card that "worked" for almost two weeks)
Only Left channel= totally fine picture 50%
Only Right channel= Fireworks/colors 50%
Both: Fireworks/colors 100%, probably a busted card right?

Replacement card 2
Only Left channel= totally fine picture 50%
Only Right channel= Picture on 50%, but also disturbances(few horisontal/vertikal lines and some shading) over all screen(even if left is disconnected) starting to think this is panel issue..
Both= no picture

Original t-con
Only Left channel= totally fine picture 50%
Only Right channel= Picture on 50%, but disturbances was totally same as with replacement card 2 so i now really thought panel issue, 10 seconds later picture were again crisp and fine, with no issues....
Both= No picture.
Really back at square 1.

Will probably try the FW-method with replacement card 2, thoughts?

Again, thanks a bunch for trying to help me, really appreciated.

[lotas]

Re: T-con suspect issue. Both ribbon cables no picture. One ribbon cable ok. (58pus85

Did a new test on the different T-cons now with following result:

Replacement card 1 (this was the card that "worked" for almost two weeks)
Only Left channel= totally fine picture 50%
Only Right channel= Fireworks/colors 50%
Both: Fireworks/colors 100%, probably a busted card right?

Replacement card 2
Only Left channel= totally fine picture 50%
Only Right channel= Picture on 50%, but also disturbances(few horisontal/vertikal lines and some shading) over all screen(even if left is disconnected) starting to think this is panel issue..
Both= no picture

Original t-con
Only Left channel= totally fine picture 50%
Only Right channel= Picture on 50%, but disturbances was totally same as with replacement card 2 so i now really thought panel issue, 10 seconds later picture were again crisp and fine, with no issues....
Both= No picture.
Really back at square 1.

Will probably try the FW-method with replacement card 2, thoughts?

Again, thanks a bunch for trying to help me, really appreciated.

If on different T-cons the left side shows well, but the right side is distorted, then the problem is in the panel or in the right panel bar. Take a photo of the right bar.

[Diah]

Re: T-con suspect issue. Both ribbon cables no picture. One ribbon cable ok. (58pus85

we do make judgment from what written by you.... first One day fine..

I thought it might be t-con and ordered new t-con from china(supposedly tested) and mounted this. This worked totally fine first day. 2nd day i got some horisontal lines

and then... 2 weeks working fine

Replacement card 1 (this was the card that "worked" for almost two weeks)

so all the answers from me and any other will be just guess, from that you did many time trying replacing T-CON.. did you took the ribbon cable ad inspect them under good loop if any of the contact pins got short / broken , move to side !!!!
if they are fine... then the side of bad screen.. need to inspect the panel edge buffer boards

[nomoresonys]

Re: T-con suspect issue. Both ribbon cables no picture. One ribbon cable ok. (58pus85

So appreciated with your feedback, thanks!

I tried to run a rubber over all the pins without luck. Did only use my eyes to check and i see poorly so maybe i will try zoom/photo with my phone and post here for you to see?

But my logic are saying it is no errors with the ribbon cables as they work independently? Maybe LDVS when both signals is passing through? What do you think about my reasoning here? This is the first time i am trying to repair a TV after some Youtube schooling.... so bear with me if I am not following all logic here. I have a multimeter somewhere... but knowledge how to use it... not yet at least...

Not sure if the tape-off method will work here, as i understand that would probably be an idea if i got picture with both cables but ended up with picture with horisontal lines?

Shorted/defective panels will but do not ALWAYS present with horizontal lines.

[nomoresonys]

Re: T-con suspect issue. Both ribbon cables no picture. One ribbon cable ok. (58pus85

If on different T-cons the left side shows well, but the right side is distorted, then the problem is in the panel or in the right panel bar. Take a photo of the right bar.

.

[nomoresonys]

Re: T-con suspect issue. Both ribbon cables no picture. One ribbon cable ok. (58pus85

Did a new test on the different T-cons now with following result:

Replacement card 1 (this was the card that "worked" for almost two weeks)
Only Left channel= totally fine picture 50%
Only Right channel= Fireworks/colors 50%
Both: Fireworks/colors 100%, probably a busted card right?

Replacement card 2
Only Left channel= totally fine picture 50%
Only Right channel= Picture on 50%, but also disturbances(few horisontal/vertikal lines and some shading) over all screen(even if left is disconnected) starting to think this is panel issue..
Both= no picture

Original t-con
Only Left channel= totally fine picture 50%
Only Right channel= Picture on 50%, but disturbances was totally same as with replacement card 2 so i now really thought panel issue, 10 seconds later picture were again crisp and fine, with no issues....
Both= No picture.
Really back at square 1.

Will probably try the FW-method with replacement card 2, thoughts?

Again, thanks a bunch for trying to help me, really appreciated.

Can you show pictures of these distortions.

[Oliver Neno]

Hello.

Im having the same issue with no picture if both is in and if either one is disconnected the other half show picture. Tried the tape fix on a pin that looks darker then the rest on the left lvds cable( looking from front of the tv. Then i get picture but some white lines flickering on the screen. Can this be the pin that is damaged and i only need a new cable? The tv is out of warranty ofc...