Samsung UN65JS6000 lines in screen and reboot

[Curlysfries]

I have a Samsung UN65JS6000FXZA and have been having issues with it over the past few months. I will randomly get vertical and horizontal lines red and green and they get worse and worse until the entire Tv just resets. Sometimes it comes back on and it's fine sometimes this cycle continues for hours.

I have opened it up and checked for discoloration on cables (burnt) or anything else but dont see anything obvious. I had read on forum that cables could be a cause but I don't seem to have any bad cables.

Any help would be greatly appreciated. Picture and all is great when working so hate to trash.

[nomoresonys]

Re: Samsung UN65JS6000 lines in screen and reboot

Try powering up one side of the screen at a time by disconnecting each ribbon cable from tcon to panel, one at a time and see what you get on display.(always disconnect and reconnect cables with power cord unplugged to avoid any damage) Cables should come off easily, never force anything.

[nomoresonys]

Re: Samsung UN65JS6000 lines in screen and reboot

Make sure the cables are seated properly, maybe clean them, some use a pencil eraser or a swab and isoprophyl alcohol, not too hard they can be delicate.

[Curlysfries]

Re: Samsung UN65JS6000 lines in screen and reboot

So I tried the alcohol and checked the cords, but even after a few days still having the issue.

Any other suggestions?

Thanks

[dick_barton]

Re: Samsung UN65JS6000 lines in screen and reboot

I wonder if it's a graphics fault. I don't think it looks like a panel/COF fault. The lines being displayed appear blocky.
Do you have pictures of the back of the set showing circuit boards and layout?

[Curlysfries]

Re: Samsung UN65JS6000 lines in screen and reboot

Does this help with board. Pics attached

[dick_barton]

Re: Samsung UN65JS6000 lines in screen and reboot

What's the power supply board number?
Can you post pics of the individual boards

[Curlysfries]

Re: Samsung UN65JS6000 lines in screen and reboot

Thanks for looking into. I'm at a loss...

[dick_barton]

Re: Samsung UN65JS6000 lines in screen and reboot

The photo's don't open up large enough to see details on the circuit boards.

Does the set run longer when the back is left off before the lines appear.

Do any of the supply voltages drop when the lines start to appear.

It would be interesting to see what others may think could be wrong.

[Curlysfries]

Re: Samsung UN65JS6000 lines in screen and reboot

Maybe this will be better. Will check other suggestions. I did replace power board and same issue

[Curlysfries]

Re: Samsung UN65JS6000 lines in screen and reboot

Larger pics

[dick_barton]

Re: Samsung UN65JS6000 lines in screen and reboot

Are the voltages correct as given on the silkscreen and do any of them drop when the fault appears?

[budwich]

Re: Samsung UN65JS6000 lines in screen and reboot

the pictures appear to indicate that you did not take enough stuff off to get at ALL the cards... in particular the tcon which is under the lower "tin can". Check the cabling there and do the tests as indicated in post 2.