alterniTECH

On 12/31/2021 at 2:32 PM, RadioRon said:

I'm writing to thank the posters frenkygo and alterniTech and many others before them for all their insite into this problem. I have an OLED65B7P which has been displaying intermittent problems with the magic remote (mainly the bluetooth enabled functions), with the frequent pop-up  "wired lan cable disconnected" messages,  and with hesitation of images on streaming while using ethernet connection, and on having no WiFi function at all (No way to turn on Wifi).  These communication issues recently culminated in most streaming and bluetooth functions failing almost completely.

 

After reading this entire thread, plus a few others found elsewhere, plus viewing a few videos on the subject, the solution that made the most sense to my mind is that the connector that connects the ribbon cables to the wifi module had suffered oxidation and connections that are noisy or broken. I have some training and experience in electronics, and the other potential fixes did not make it through my mental filter as making much sense. However, a bad connection on a critical high speed communication port, like the one to this wifi module, can have the effect of confusing the main board comm controller firmware, and causing constant interruptions thereby using up processing bandwidth. In the final stages of my problem, I even noticed that simple commands from the remote, like MUTE, were responded to very slowly, which reinforced my opinion that processors are overloaded with interruptions.

 

I also assumed that Bluetooth was also handled through the Wifi module, which would explain why I could no longer register my remote.

 

This solution is also consistent with those that fixed their tv by unfolding the ribbon cables because those folds are very close to the module connection, and the process of unfolding these would certainly jiggle this tiny connector enough to clean up connections through the wiping action of the internal contacts. Any slight movement of the connector relative to the module is likely to clear the problem. To my knowledge, I don't believe that those folds are the fundamental root of the problem. Their performance and behaviour is unlikely to change over time, and since the ribbons are shielded types, they are not likely to interfere with each other any more after a couple of years than when they left the factory. I may be wrong on that, and to be sure, I also unfolded my ribbon cables. There is no downside to doing this as long as you don't cause those ribbons to be caught between things on re-assembly.

 

While doing the fix, I attempted to brush the connector pins with isopropyl alcohol and push the connector in and out at least 5 times. The connector is tiny, so its hard to say if the alcohol  helped.   I have no idea how long this fix will last before oxidation once again rears its ugly head, but confident that a half hour of minor surgery can fix it again.

To sum up, my TV is now working perfectly.  The magic remote registers immediately and performs as new.  Hesitation on streaming sources is gone.  I believe that this has also cleared the problem of the popup messages "Lan cable disconnected" followed by "lan cable connected", but need to give it some time for proof.  I think all problems have all been eliminated.

Edit: Jan 3: Yes indeed the recurring popup messages about "lan cable disconnected" are gone.

This is great!  Mine too continue to works.  No more problems!

On 12/20/2021 at 3:06 AM, frenkygo said:

WAU !!! 

My TV LG 65SK8100PLA was have a several problems, FREEZING, FREEZING SOUND, Network DISCONNECTED, SLOW DOWN, MAGIC REMOTE NOT WORK.

My way to solution ?

1. unscrew back of TV - there is a lot of screw - be careful all are not be same !! Remeber position of screw ! (you must put down stand too)

2. carefully put back cover out - its holding you will need a plastic tool to make it free, its holding on sides.

3. on my TV you must unscrew plastic on bottom of tv - there under is wifi card - be careful through the bottom holder there are several cables that you have to loosen before removing. ( be careful all screw are not be same !! Remeber position of screw ! 4 on up, 2 on bottom)

4. pull the white ribbon cable out of the motherboard - lift the black fuse before pulling it out!

5. now you can take bottom plastic out - now you can see your wifi card and STUPID RIBBON CABLE. 

6. on my TV ribbon cable have two lines - one to wifi, second to switch. 

7.  CAREFULLY cut the last blue ribbon and choose the ribbon cables that lead to the wifi card. As you can see from the card, the cables are extremely broken.

8. Loosen the gray tape holding the ribbon cable, and straighten the broken cables. I taped the cables with double-sided adhesive tape and glued them straight up. 

9. Clean the ribbon cable with IPA (isopropyl alcohol) before you take it back to the motherboard - double check that you have inserted the connector into the board correctly. Secure with a  black fuse.

10. now you can take all parts back.

11. DONE

I have 100% function back for my TV. All functions are back - no freezing, magic remote working all time, no disconnecting wifi and lan. Im super happy now.

 

THX - alterniTECH 

 

 

Glad your TV is working now.  Mine is still working flawlessly, couldn't be happier.  I hope others that are having this problem give this a try!  I wonder how many have been thrown away because of this, such an easy fix!!

On 7/3/2021 at 9:20 PM, alterniTECH said:

I too have this issue with it "freezing", it happens not only on netflix, prime, but also Tablo, AND reguluar over the air channels.  The sound goes away for a couple of seconds as well.  I also have the network cable disconnect/reconnect message from time to time, and also the "magic" remote isn't so magic anymore.  Ugh.  I see many suggestions.  I'm going to try the suggestion of un-crimping the cable, and see what happens.  I'm wondering if there's some sort of internal conflict with the networking, i.e. bluetooth, wifi, lan, and the processor just going into overload and cannnot catch up.  One thing is for sure.  With this many people having similar issues, this, is justification for a CLASS ACTION LAWSUIT against LG.  Any lawyers out there paying attention?

UPDATE:  So after reading some of the recommendations about the issue of "Network Disconnected" on LG TV's, and FREEZING, sound stopping on LG TV's, I decided to follow some of them.  And, thusfare, I have solved my problem.  What I did:

I laid the TV on my bed, face down.  I removed all the visible screws on the back panel and removed it.  I found that there are some "ribbon cables" (They're called that because they resemble ribbon material) that have tight bends, and are taped together going from the system board down to the lower center of the TV where the power button and the WIFI card is.  I carefully removed the tape holding them tightly together, and carefully straightened the cables out (as best as possible, you won't be able to really straighten them) where they had tight bends.  I then tightened the screws that hold the system boards (two boards) to its frame, they were pretty loose.   I also gently pushed on the connection points of the ribbon cables to assure tight connection.  (NOTE:  On my TV, the lower portion where the wifi network card and power button is located has a plastic frame of sorts that I too losened to be able to get to those cables properly).  I then put everything back together, and, I am happy to say, NO MORE PROBLEM.  So, in my case (and more than likely in yours too) it appears to be a cabling issue where overtime the laws of gravity mess things up (and/or transportation of the unit) losening things up like the connections and/or screws).  So, I'm a happy customer on my own account.  I hope this is helpful.  PROBLEM SOLVED.  (On another note, turning off notifications or disabling features  or other items via the settings on the TV is not a fix, I don't recommend doing so).

On 6/28/2021 at 1:28 PM, Lynda2 said:

Hi, I did this and the tele was fine for the whole of a month!!
i lost my data for Prime and had to rejoin.

I also have problems with the tele freezing for a couple of seconds then unfreezing and speeding up to catch up! This happens when watching Netflix and Prime, I don’t know if this is my broadband or tele. 

I too have this issue with it "freezing", it happens not only on netflix, prime, but also Tablo, AND reguluar over the air channels.  The sound goes away for a couple of seconds as well.  I also have the network cable disconnect/reconnect message from time to time, and also the "magic" remote isn't so magic anymore.  Ugh.  I see many suggestions.  I'm going to try the suggestion of un-crimping the cable, and see what happens.  I'm wondering if there's some sort of internal conflict with the networking, i.e. bluetooth, wifi, lan, and the processor just going into overload and cannnot catch up.  One thing is for sure.  With this many people having similar issues, this, is justification for a CLASS ACTION LAWSUIT against LG.  Any lawyers out there paying attention?