Horizontal Dashes in an LG LCD TV
Main board or Tcon???
Main board or Tcon???
Attached Files
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Re: LG 47SL80 Horizontal "Dashes"......
Try cleaning and reseating the LVDS cable at both ends and the FFC on the T-CON Bd. to the Source/Panel Bds. Looking again at your 2nd pic, is the image showing whitish on the screen? -
Re: LG 47SL80 Horizontal "Dashes"......
Nope.. That's just the glare...
This appears to be an LCD and has a pair of ... crap brain fart... can't remember their name... Diverter boards??.... INVERTER!!!
It has inverter boards.. Maybe they are the problem???Comment
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Re: LG 47SL80 Horizontal "Dashes"......
Are they flashing or are they stationary? Actually I've never encountered anything like this before.Comment
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Re: LG 47SL80 Horizontal "Dashes"......
They seem to be moving all over the screen...
I'll get a better pic when I get to the shop...Comment
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Re: LG 47SL80 Horizontal "Dashes"......
Have you tried just running the test pattern as shown in the attachment. It would eliminate the panel and Tcon as the fault.Willing to help but I'm no expert.Comment
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Re: LG 47SL80 Horizontal "Dashes"......
Thanx for that.. I'll give it a shot..
Everything looks clear except jumpering the 12v from the fuse to the SMPS board??
What's the SMPS Board??Attached FilesComment
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Re: LG 47SL80 Horizontal "Dashes"......
SMPS: Switched Mode Power Supply.
So that would be your PSU or Power Bd.Comment
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Re: LG 47SL80 Horizontal "Dashes"......
OK Thanx.. I mis-read it..
Gimme a few to set this up..Comment
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Re: LG 47SL80 Horizontal "Dashes"......
If you have an external power supply you can use that to power the TconWilling to help but I'm no expert.Comment
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Re: LG 47SL80 Horizontal "Dashes"......
close check the LVDS cable between the main board and tcon... both in terms of the cable itself (ie. any bends, etc) and the connectors / pins. Those look like "transmission errors".Comment
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Re: LG 47SL80 Horizontal "Dashes"......
OK My TCON is a bit different than the one in the picture..
I have found corresponding connections for the LVDS connection, but I can't find any 3.3v VCC...
I have found a VIN, a VDO and a VA1....Attached FilesComment
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Re: LG 47SL80 Horizontal "Dashes"......
That sure looks like high voltage arcing causing the lines, does this tv use an inverter and ccfl lamps? If it does I would check the high voltage inverter connections (or capacitors) or it could be a cracked ccfl.
You should be able to here it, like a sizziling sound.
Post a picture of the rear of the tv and if it does have inverters there are likely two, master and slave post pictures of them also
They could look like theseAttached FilesLast edited by R_J; 06-21-2018, 08:06 AM.Comment
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Re: LG 47SL80 Horizontal "Dashes"......
Yea, it does use the CCFL lamps. It's got an inverter on either side..
In answer to a previous question.. Some of the horizontal lines are stationary and some are flashing up and down..Attached FilesComment
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Re: LG 47SL80 Horizontal "Dashes"......
Looks like it could be a BGA issue, any change to the lines of you heat the main IC on the mainboard ?Comment
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Re: LG 47SL80 Horizontal "Dashes"......
You can try disconnecting the power going to the inverter,(try one then the other) the backlight will not stay on but you may be able to use a flashlight to see if the lines are still in the imageComment
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Hello all. 3 years back, with your help, I replaced the LEDs on this TV. It's been working great. Yesterday, I turned it on (garage TV), and it has blurred horiz / vert lines as you see in photos. Definitely no physical hit or damage. Top 1/6th of the screen is perfect. Could it be main / TCON board? No tabs to cut on this model. Thank you...Yesterday, 08:07 AM
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Just bought this for 10 bucks yesterday hoping to fix it. The guy said water dropped inside from a dehumidifier hose and it started showing black and white vertical bars then went blank. When I got it home and turned it on it came on fine and displayed correctly but I was noticing faint vertical bars in the image. After a little bit I turned it off and back on and it was a black screen again. I opened it up to check for water damage and corrosion but didn't find anything of the sort. I cleaned the ribbons anyway and reconnected them but still got a blank screen. If I disconnect the right side... -
Hi There,
This TV was auto switching off after few seconds with some vertical lines on the screen, so got a new TCON board and replaced it.
After replacing the TCON board it was working fine and i set it up with everything, used for few hours, then had the bright idea to update the software on it. During the update process, TV switched off and now no audio or video. No relay switch sound.
More Details
TV Model - LG OLED77G1PUA
Got the same exact TCON board from TVPartsToday and replaced it. But didnt transfer the EPPROM data (didnt... -
Hello everyone,
I've recently been given a Sony 8k Z8H. It's got a white screen with two vertical black bars. At times it's given me the 5 blink Tcon code. Testing voltage on the Tcon I can see some low or missing voltage. I've done a basic visual check of cables and the COF. Not seeing anything obvious. The original Tcon seemed to have good caps until turning it over. On the bottom I found maybe 10 caps with both sides of the caps shorting to ground. I thought ok these caps and likely other components on the Tcon are shorted so let's try a replacement Tcon. I just received the... -
Hi,
i have a 65 Panasonic TX-65HX710E using vestel 17MB170 main and Lg tcon.
Few drops of water fell probably near COF and have no display. Tried removing tabs but no.part of display present as if tcon fuse open. However 12v is present and tcon can be felt warm enough that supplies are present. Backlight and sound ok.
Anyone knows if this TCon 6870c-0805A has any special test pins for rgb test?
Appreciate your help....
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