Sony TV Thick Vertical Line on Panel - Page 1
Forum section: electronics / repair

author: utkumaden
author_rank: Newbie
timestamp: December 01, 2014, 08:15:15 pm
content: I have a 3 year old Sony TV. I realized today it has a thick darkening line going through the screen as seen in the attachments. I suspect it is the LEDs that burned out. I hope it is just the. LEDs because if it is the panel, it would be really hard to replace. Cons of 50 i. TV right? I wondered what it wouldbe. Help will be much appreciated. Thank you!

author: utkumaden
author_rank: Newbie
timestamp: December 01, 2014, 08:25:10 pm
content: Here is the other picture that I failed to upload *facepalm*

author: wraper
author_rank: Unknown
timestamp: December 01, 2014, 09:01:50 pm
content: This is definitely not faulty backlight but most probably LCD itself.

author: CarbenZone
author_rank: Newbie
timestamp: December 02, 2014, 12:14:13 am
content: maybe not a good secure connection on a ribbon cable? or maybe just that one decoder is failing, in which case the whole panel needs to be replaced.

author: Marco
author_rank: Super Contributor
timestamp: December 02, 2014, 12:54:40 am
content: The edges look extra-ordinarily crisp, it's hard to believe the leds have such well defined beams. On the other hand how could a problem with the panel cause such weird slanted edges? It obviously doesn't line up with the column or row electrodes.

author: SeanB
author_rank: Super Contributor
timestamp: December 02, 2014, 04:45:01 am
content: Dying caps on a board will do this as well, or a failing voltage divider. Check on Badcaps.net for this model and the fixes used. Not likely to be the LCD itself, unless left for a long time.

author: miguelvp
author_rank: Super Contributor
timestamp: December 02, 2014, 04:51:25 am
content: Quote from: Marco on December 02, 2014, 12:54:40 amI think the slanting is due to the camera angle to the display, taking the perspective into account it seems they are parallel, but I could be wrong.It doesn't help that the first image has different angles of the actual video signal intersecting the dark band, giving it an optical illusion making it look even wider.Edit: but it looks like the pictures where both taken from the top of the TV looking down.

author: utkumaden
author_rank: Newbie
timestamp: December 02, 2014, 05:53:25 am
content: Yeah it is probably the panel. There are green dead pixels on the grayish zone. You can't see it in these pictures but when it's (tries) to show an orange background you can easily see green. There are severe green pixels on the right edge. Thanks!

author: Shock
author_rank: Super Contributor
timestamp: December 02, 2014, 04:46:01 pm
content: Clean or reconnect connector, failed connector tab bonding, faulty solder joint, faulty driver IC.

author: wraper
author_rank: Unknown
timestamp: December 02, 2014, 05:21:10 pm
content: Quote from: SeanB on December 02, 2014, 04:45:01 amHow dying capacitors are supposed to create something like this, I would rather suspect dying IC which drives those columns of pixels. Or bonding failure of that IC/flex cable (between PCB and glass) where it resides.

author: simplifyiyuk
author_rank: Contributor
timestamp: December 02, 2014, 09:48:16 pm
content: unfortunately I'd wager a fault with the panel itself. most likely the drive voltage for that particular patch. maybe not tab bonding or drive IC than some passive on the PCB that the tabs bond on to gone a bit awry.

author: Rasz
author_rank: Super Contributor
timestamp: December 03, 2014, 11:16:07 pm
content: Quote from: SeanB on December 02, 2014, 04:45:01 amnolike 2 last posts said this is lcd panel itselfone of bonded tabs went bad, sometimes can be temp fixed by bending/flexing/pushing some paper between metal frame and glassall in all you need new LCD panel for that tv