LG 65" Smart TV Failed Repair - Page 1
Forum section: electronics / repair

author: Fingers crossed
author_rank: Newbie
timestamp: August 15, 2023, 10:14:13 am
content: Hi I'm in need of some advice, please see attached PDF, any help will be appreciated, and who knows we may even save another TV from hitting land-fill.

author: wraper
author_rank: Unknown
timestamp: August 15, 2023, 10:39:08 am
content: Well, connector is totally fine, no need to order a new connector whatsoever. It's PCB that got broken with pads ripped off. So you either need to solder it back to the remains of broken pads/traces (would not be difficult to me but can be very difficult for novice) or buy a new main board. I see it available pulled from smaller size models which most likely will work for this as wellhttps://www.ebay.com/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313&_nkw=EAX66804605&_sacat=0Also it would be the best to change TV model to proper one in service menu.https://www.reddit.com/r/OLED_Gaming/comments/sbords/how_to_access_lg_service_menu_without_the_service/EDIT: Also I see these boards come in variants with 1 or 2 LCD panel connector assembled. If you decide to buy one, ensure it's the same as yours.

author: Fingers crossed
author_rank: Newbie
timestamp: August 16, 2023, 09:00:29 am
content: The problem with my TV was a faulty powerboard which I have replaced, TV works fine only problem that I am only able to view 1 channel as I pulled out the cable that attaches the main board to the keyboard which operates standby, on/off, volume and remote sensor, the mainboard doesnt need replacing, what I would like to know is how I can reattach the cable, any help appreciated.

author: wraper
author_rank: Unknown
timestamp: August 16, 2023, 09:31:01 am
content: Quote from: Fingers crossed on August 16, 2023, 09:00:29 amI already said you need to solder the connector back to where it was ripped off. The problem is that it was ripped of together with pads from PCB which makes the job much harder.You need to do the same as on these videos but with more terminals.

author: wraper
author_rank: Unknown
timestamp: August 16, 2023, 10:04:31 am
content: Now looking more onto it, I thought you torn off the connector from the main board but it does not look to be the case. Then torn off connector is still on FPC cable. But connector on that small board is still in place. So I don't see/get from where you have torn it off.

author: wraper
author_rank: Unknown
timestamp: August 16, 2023, 10:18:19 am
content: Just so you get, there are two connectors on the flex cable. They can be separated by pressing on the latch and pulling them apart. There is no place shown on your photos from where this connector was torn off. EDIT: it's actually torn off from another board nearby. On the small black PCB that you were showing, part which must be on a flex cable remained attached to PCB and FLEX cable got pulled out of its connector instead.

author: Fingers crossed
author_rank: Newbie
timestamp: August 16, 2023, 12:32:28 pm
content: Thank you Wraper for your expertise, I didn't realise this was torn from the board as you have pointed out. Would you think that someone with experience with similar boards would be able to connect existing cable back onto the boards I have ripped them from?

author: wraper
author_rank: Unknown
timestamp: August 16, 2023, 01:04:30 pm
content: In regards to the black board you can remove the connector from by pressing the latch. Then on the connector you'll remove there is another black latch or lever (not clear on the photos) that you can open (carefully, how depends on its type), put another flex cable with bare contacts (visible in PDF) inside it and close the latch. Another cable with torn off connector attached apparently needs latch opened and cable realigned as the cable does not seem to be sitting straight inside the connector. Some similarly looking connectors just need the cable pushed inside with no opening any levers. Again clear photo of the connector would help me to say how exactly and if it needs to be opened. As of the board that got damaged, buying replacement board would be cheaper than paying someone in Australia to fix it. With no micro soldering experience and microscope or at least some sort of magnification it would be near impossible to fix.