We had a power outage but TV seemed to be working fine afterward. This morning it showed a "grainy" picture, and then next time we turned it on it's stuck in a test-pattern loop. None of the resets I've tried have any effect, including unplug/wait/plug in - it immediately goes into this cycling test pattern.

Does this suggest the main board needs replaced? The TV is about 5 years old, picture still looks great (tho limiting to crisp red/green/blue/white lacks some variety ...

Re: Sony KDL 46W4100 with worsening vertical lines in horiz blocks

In case anyone finds this thread, wanted to post resolution.

I tried heating but no effect. So I thought I'd try replacing the t con board and eventually found one on e-bay for $40 or so. lo & behold swapping it out made the tv work like new again. yay!

Is there any use for the old t con board (can it be refurbed by switching out capacitors or whatever?) or should I just throw it out.

Thanks for the encouragement to explore and get it fixed!

Re: Sony KDL 46W4100 with worsening vertical lines in horiz blocks

Panel sticker is cunningly hidden under the metal shield which holds the main board, challenge to get a picture without dissembling main & power board, but sticker shows this Samsung S-LCD panel:

LTY460HC01
0821
P7AE 7M8E08762A 103

LTY460HC01103


Also managed to extract the t con board from its enclosure, picture also attached. No signs of obv damage there.

I'll try some heating of the main board next - tho it makes...

Re: Sony KDL 46W4100 with worsening vertical lines in horiz blocks

Here's some pics of the inside. I disconnected the t-con board (4 ribbon tapes, 2 larger cables) and reattached, tried putting light pressure on tape connection, no change in the picture defect from earlier pics. I can't see any components that look obv bad, but I'm no expert.

I assume the t-con pcb board should be removable from the heatsink housing? I think i've removed all screws (there's one thing that looks a bit like a flush thumbscrew with a circular key which I don't know how I'd remove - see...

Re: Sony KDL 46W4100 with worsening vertical lines in horiz blocks

Is there any good way to test that theory short of buying a new board and swapping it?

I've owned this TV since new, about 10 years old, but in last few months started to show some vertical lines in the bottom half of the screen which would disappear after a few minutes "warming up".

Lately the vertical lines fill the whole screen, and no longer disappear. They are laid out in four and a bit horizontal bands, and are mostly static but sometimes seem to have a little 'flicker'. You can still see the picture 'behind' the lines, and appear on all inputs I've tested: several HDMI and internal TV as well as the menu screen. See attached for examples.
...

Re: New Members - please post your introductions here

Hi, Patrick here in Montreal. Trying to diagnose a problem with an LCD tv, will post some pics in separate thread.