Vertical white fading lines on Sams LED

[Jcov]

I got a UN46B7100WFXZA, Samsung led, started with thin black horizontal lines, few days later went to white/red verticle lines. Can still see pic but looks bad, what can I check?? Please help only 3 yrs old(tv)

[Jcov]

Re: Vertical white fading lines on Sams LED

here are some pics

[tom66]

Re: Vertical white fading lines on Sams LED

I would say T-con... common failure on Samsung TVs.

[Jcov]

Re: Vertical white fading lines on Sams LED

is there anyway i can test tcon before i replace it??
where is best place to purchase tcon and manual for the particular samsung??
thx a millon

[tom66]

Re: Vertical white fading lines on Sams LED

Do the lines affect the menu, such as the setup menu or volume control?

Do the lines fade in slowly, or suddenly appear? After appearing, do they stay as they are, or do they fade in?

[Jcov]

Re: Vertical white fading lines on Sams LED

yes lines are shown on menu,settings, and all inputs.

when first turn on tv it slowly fades in, then when watching the line fade on the left side and right side. but the white lines seem to stay. 2 days ago pic was great for only few hours but right back to line been like it since

[tom66]

Re: Vertical white fading lines on Sams LED

The only board capable of creating "fading" effects is the T-con, as far as I am aware.

I found one seller for $56:
http://www.ebay.co.uk/itm/Samsung-UN...#ht_1581wt_736

That's a lot to pay - you may be able to get it cheaper elsewhere. Also, disassemble your TV and find the T-con to get the exact part code, it may be different.

[Jcov]

Re: Vertical white fading lines on Sams LED

wow im bout to take it apart now and check ive never worked on a tv before but im very mechanically inclinded so ill see if i can find the part number. thank u so much for ur expertise and help

[kevinm34232]

Re: Vertical white fading lines on Sams LED

I've had quite a few TV's where it seemed the T-Con was the culprit and that did not turn out to be the case. Without a scope could never determine whether it was the panel or main board but I suspect the main board in at least a couple times.

One case was a 26" LG, picture would freeze horizontally, sometimes a white screen. After heating up would work normally. Replaced t-con, same result. Sold lcd panel and power supply which worked for buyers. Last part left is main board.

My next tool purchase will be Tom's Rigol scope when he upgrades

[ben7]

Re: Vertical white fading lines on Sams LED

Sometimes if there are bad caps in the psu, it can cause issues with the video processing. Too much ripple can cause errors and such in the processing.

[Jcov]

Re: Vertical white fading lines on Sams LED

did not notice any bad capacitors just visually inspecting do i need to check uf on all capacitors,

the tcon board is 2009FA4C4LV0.9

[Jcov]

Re: Vertical white fading lines on Sams LED

i was just about to order the tcon from cali they told me it could be they panel is bad and to call back tomorrow to talk w/ a tech, does that sound right the tcon was 99$ which is a lot better than a 400$ panel

[tom66]

Re: Vertical white fading lines on Sams LED

did not notice any bad capacitors just visually inspecting do i need to check uf on all capacitors,

the tcon board is 2009FA4C4LV0.9

You would need an ESR meter to check the caps.

I have found bad caps where the capacitance (uF) tests fine and some where it even tests higher.

It looks like a t-con fault, but I suppose you can't rule out the power supply - Samsung have a lot of power supply faults too. The newer ones don't generally suffer from bad caps though.

[Jcov]

Re: Vertical white fading lines on Sams LED

After talkin 2 another tech he was thinking it was the panel & not the tcon, does that sound right? Is the panel a common problem on a Sam. LED. Do u think it's worth trying a tcon 1st if not I don't believe it worth replacing panel due 2 cost... Any input would be greatly appreciative

[tom66]

Re: Vertical white fading lines on Sams LED

It COULD be the panel, but that basically writes off the TV. Panel failures usually affect only one half of the picture, not the whole picture. A t-con would be a good gamble if you saved the TV and if you can get it cheap. (Usually, t-cons are around $20 each, so you might consider making the seller an offer on it - it's worked before for me.)

[mbates14]

Re: Vertical white fading lines on Sams LED

its definitely a bad panel. it looks like it anyway. panel failures affect any portion of the screen whether partial or all of it.

Especially if the picture ghosts its 99% bad panel. Its definitely a tossup, but im betting on the panel.

[tom66]

Re: Vertical white fading lines on Sams LED

its definitely a bad panel. it looks like it anyway. panel failures affect any portion of the screen whether partial or all of it.

This where I disagree. Most people would write this Samsung TV off with a bad panel:
https://www.badcaps.net/forum/attach...4&d=1333908115

Especially the repeating lines, affecting the whole screen? New T-con fixed it.

These two pics are budm's. Both bad t-cons:
https://www.badcaps.net/forum/attach...9&d=1333492925
https://www.badcaps.net/forum/attach...0&d=1333492925

(Samsung panels in Sony TVs.)

This video is an example of a bad panel; the problem only affects half of the screen (AUO panel): http://www.youtube.com/watch?v=purk_SyiT44&feature=plcp

Bottom line is, panel failures usually only affect parts of the screen or cause screen-wide ghosting. They rarely affect the whole screen with lines - that requires multiple gate-driver ICs on the tab bonds to have failed. Now, I have less experience with newer Samsung panels - so it could be different now.