Kogan KALED553D1A vertical lines and pixelation

[antirealm]

Hi everyone, this is my first thread but I've found this forum useful before, thanks to it I now have a working 40" LCD for $30. Yippeee!

I'm back now with another one, I've looked into it as much as I can and I'm guessing its a t-con board problem. But before I order a new one, I wanted to get your thoughts on these photos.

On black screen we see vertical lines evenly spaced across whole screen. with a few other green pixels. Another photo has what the "No signal" message looks like, and on the final photo we see the menu with all funky colors.

The T-con board I'm looking at getting is a CMO model number V546H1-CS2

Thanks for your time. Pat

[tom66]

Re: Kogan KALED553D1A vertical lines and pixelation

I have seen this before on cheap TVs. It was a loose cable between the main board and T-con board.

[antirealm]

Re: Kogan KALED553D1A vertical lines and pixelation

I checked that they seem ok, any other ideas?

[tom66]

Re: Kogan KALED553D1A vertical lines and pixelation

Can we see some pictures of the chassis layout?

[antirealm]

Re: Kogan KALED553D1A vertical lines and pixelation

yeah sorry for the late reply, its not the greatest photo. :/ thanks man

[antirealm]

Re: Kogan KALED553D1A vertical lines and pixelation

ok, I've jiggled LVDS1 and LVDS2 while tv was on, seems to change the picture but never fix it.

[tom66]

Re: Kogan KALED553D1A vertical lines and pixelation

Have you removed and plugged back in all of these connectors?

[antirealm]

Re: Kogan KALED553D1A vertical lines and pixelation

yeah i did, nothing.

[tom66]

Re: Kogan KALED553D1A vertical lines and pixelation

When you fiddle with those the lines change and go away briefly?

[antirealm]

Re: Kogan KALED553D1A vertical lines and pixelation

they changed color and what not but never left. they do go away when i go to menu but the picture is still scrambled as per screenshots.

[tom66]

Re: Kogan KALED553D1A vertical lines and pixelation

Tough one. I'm thinking the cables are defective since you really should see no change when wiggling them -- assuming the cables stay seated. Either that, or the main board is defective. It's hard for me to be conclusive -- sorry...

[antirealm]

Re: Kogan KALED553D1A vertical lines and pixelation

thanks for your time anyway. is there an easy way to replace the cables?

[tom66]

Re: Kogan KALED553D1A vertical lines and pixelation

You can contact an ebay seller of the parts for this TV. If they have broken up this TV they may be able to sell you the cables. Alternatively Kogan may be able to supply them directly, though as they are simply a rebadge factory (buying from Chinese manufacturers and simply supplying their logo and specification), I have my doubts.

[antirealm]

Re: Kogan KALED553D1A vertical lines and pixelation

ok thanks. one last question, do you think its more likely to be the main board and not the t-con board that is broken?

[tom66]

Re: Kogan KALED553D1A vertical lines and pixelation

Is this a TV which has motion interpolation? e.g. 100/120Hz/200Hz/240Hz?

[antirealm]

Re: Kogan KALED553D1A vertical lines and pixelation

yeah 100hz

[tom66]

Re: Kogan KALED553D1A vertical lines and pixelation

I know earlier Samsung-based TVs put the motion interpolator on the LCD t-con. That could be bad. Can we see a picture of the T-con, with the shield removed?

[antirealm]

Re: Kogan KALED553D1A vertical lines and pixelation

i will have to get the photo later but this is one i found on the net if it helps: http://assets.shopjimmy.com/media/ca...064376-top.jpg

[tom66]

Re: Kogan KALED553D1A vertical lines and pixelation

No motion interpolator on there, then; that's just an ordinary T-con board. The motion processing is done on the main board then.