Mulja tv repair portal

Equipment Repairs => LCD TV forum => Topic started by: SlyAKs on December 22, 2015,11:11:45

Title: Toshiba 50L4353D 50 inch LED... panel or t-con fault?
Post by: SlyAKs on December 22, 2015,11:11:45

As above, please follow link showing video of fault.. Any ideas if it's panel or t-con?  Please note the TV is sitting upside-down while recording.. The fault is horizontal lines and a fuzzy image alternating to near perfect picture..

https://youtu.be/WZ-cSdTZqQU

Cheers

Title: Re: Toshiba 50L4353D 50 inch LED... panel or t-con fault?
Post by: Turnip on December 22, 2015,11:40:54

Hi Sly,

Assuming the set is the right way up, surely not the screen, if it's the original - Note some screens feed from the bottom so guess Main board / T-con sorts it.

Recall another chap on Quuq had exactly the same problem, can't recall Make, Model or if he found a solution - Best of luck - Chris.

Title: Re: Toshiba 50L4353D 50 inch LED... panel or t-con fault?
Post by: SlyAKs on December 22, 2015,11:54:59

Sorry Chris, should have explained, the set was sitting upside-down when I recorded.. Lol fault is the screen alternating between horizontal lines and fuzzy image to perfect again.. Sometimes worse than others

Still think t-con or main?

Title: Re: Toshiba 50L4353D 50 inch LED... panel or t-con fault?
Post by: downunder on December 23, 2015,02:39:33

That's reminiscent of the early Sony LCDs that had problems with the bonding of the flexy cables to the top of the panel, but I may be wrong.

Bruce

Title: Re: Toshiba 50L4353D 50 inch LED... panel or t-con fault?
Post by: SlyAKs on December 23, 2015,05:38:56

I was thinking it could be the flexi's Bruce, so I removed the frame covering them and inspected them. I also added pressure to each one when the TV was on and it made no difference to the picture at all.. What I did notice though was each flexi got really hot, like it would burn your finger hot, is this normal?

Title: Re: Toshiba 50L4353D 50 inch LED... panel or t-con fault?
Post by: Turnip on December 23, 2015,11:50:18

Hi Sly,

Think leave observations to Bruce, as have never yet met a hot flexi, although plenty semi-detached  ones where foam possibly offers a temporary cure to a few - Chris.

Title: Re: Toshiba 50L4353D 50 inch LED... panel or t-con fault?
Post by: downunder on December 23, 2015,16:03:12

Yes, there's some serious heat on those flexies. Not as bad as plasmas, where if you remove the heatsink strip off the bottom flexies, the chips on the flexies quickly go pop, destroying the panel. Don't suppose some overzealous cleaner has allowed detergent to get in and corrode the flexies or board?

Bruce