Sony XBR-65X810C Bad Panel?

[toddw65]

Happy New Year y'all!

I was given this 65" Sony 4k tv that is less than 2 years old. When I first got it, the picture did display on all settings, but had an overall blue tint to it and a 4" wide blue vertical bar through it. After pulling & cleaning ribbon cables and reseating them, the picture no longer displays. The panel just shows blue and the vertical blue bar is still there. Sound works and remote functions also seem to work.

Thoughts?

[budwich]

Re: Sony XBR-65X810C Bad Panel?

IF I didn't know better, I would say that's the old... "blue screen of death" ... aka microsoft operating system locked up... :-)

Probably try and see if you can find some factory reset sequence.

[Davi.p]

Re: Sony XBR-65X810C Bad Panel?

You have 3 chances: make a better picture of tcon at sunlight, or clean away that pencil marking on the board model that someone have stupidly covered, find all the test points (ex. VCC18, VCC33, VDD) and test them in voltage an report, also the main fuse.
LAstly i think the model number is not correct, i think it begins with KDL-----

[toddw65]

Re: Sony XBR-65X810C Bad Panel?

Updates and things I should have added in my OP:

This is a replacement TCON from Ebay since that was my first thought and they are relatively cheap. I'm assuming that the markings on the board are QC.
Main fuse is good. TCON fuse is good.
All pb/tcon voltages that should be 12v are 12.6vdc. Logic voltages are all at 3.4v except TCON_ON which reads 2.8v
Model number is correct. Attached a couple more pics.

[Davi.p]

Re: Sony XBR-65X810C Bad Panel?

PLease don't use too much acronyms, i don't understand "QC", "pb/", it doesn't matter too much logic signals on tcon, first of all must see supply voltages, have you checked testpoints (TP) = VDD(15v), Cathode of big D5(15v),Vcore10(1v),VCC18(1,8V),Vcom1-2(7v?),
Vcc33(3,3v),VGL1-2(-6v?),HVDD(7,5v),VGH(27v)

[dskall]

Re: Sony XBR-65X810C Bad Panel?

Pull one ribbon to panel cable at a time and see what you get

[Davi.p]

Re: Sony XBR-65X810C Bad Panel?

If have wrong tensions disconnect ribbons one at a time and retest.

[freakaftr8]

Re: Sony XBR-65X810C Bad Panel?

This is a quirky model I'm dealing with the 75" version. Did you remove the cables from the main board to the tcon and and have the TV powered up at any time? Is power light flashing green and yellow at all?

[toddw65]

Re: Sony XBR-65X810C Bad Panel?

Sorry. By QC I meant that the markings on the board are probably from quality control at the manufacturer. As for pb, I just meant power board.

All the output voltages coming from the power board at CN6401 appear to be correct.

All 12VREG are at 12.6V and all other voltages at that connector are at 3.4v except TCON_ON which is 2.8V

[freakaftr8]

Re: Sony XBR-65X810C Bad Panel?

Just read your last post. Reload firmware via USB go to Sony website copy firmware and unzip to USB root drive put the firmware USB into the USB port on the TV and turn the TV on and let it sit for about 30 minutes. You will get your picture back. Once we get there we will research this line problem.

, It appears that the main board copies all serial numbers or something from tcon And if that ID does not match upon start up it will not power the tcon.

[toddw65]

Re: Sony XBR-65X810C Bad Panel?

Ok. I did the firmware upgrade and I *think* it went ok. USB drive was flashing and the power lights flashed blue/green for a little while and then the tv rebooted and started back up but still no image. Everything on the tv seems to work except the video. It connects to my wifi and I can cast audio/video to it with my phone, control the volume, etc. I downloaded the Sony remote app since I don't have the actual remote and based on audio cues and screen flashes, I can tell that the all of the remote functions work.

I tried disconnecting the ribbons from the tcon to the panel boards and the action of connecting & disconnecting them sometimes caused the screen to show different shades of blue and at one point half of the image actually came up but disappeared again. I'm sometimes able to get it to sometimes show the whole screen as solid blue without the vertical blue bar/line showing up, but none of the results of are repeatable when pulling & reconnecting the cables.

[budwich]

Re: Sony XBR-65X810C Bad Panel?

how is the side tab bond cables coonected to the bottom edge boards?

further please provide a bit more on your "disconnected the tcon to panel" testing. With one side disconnected, please post a picture of the display. Repeat the test with other side... again with a picture. There is something strange IF when you disconnect the tcon and the panel hasn't changed its "response".

[toddw65]

Re: Sony XBR-65X810C Bad Panel?

I'll get some pics of the edge boards and of the screen with each side of the tcon disconnected tomorrow.

Thanks.

[budwich]

Re: Sony XBR-65X810C Bad Panel?

i am assuming "bottom" but they could be along the top depending on configuration which isn't obvious from your pictures of the back/cards.... but you get the idea.

[freakaftr8]

Re: Sony XBR-65X810C Bad Panel?

PLease don't use too much acronyms, i don't understand "QC", "pb/", it doesn't matter too much logic signals on tcon, first of all must see supply voltages, have you checked testpoints (TP) = VDD(15v), Cathode of big D5(15v),Vcore10(1v),VCC18(1,8V),Vcom1-2(7v?),
Vcc33(3,3v),VGL1-2(-6v?),HVDD(7,5v),VGH(27v)

As per what Davi.p is mentioning, you need to check these voltages around the outputs ribbons that go into the panel. Loom for the little testpoints. They are labeled as such. There's a good possibility that some capacitor went short circuit on one of the panel boards attaches to the LCD panel.

[toddw65]

Re: Sony XBR-65X810C Bad Panel?

Ok. Got a chance to get some screen pics with the tcon ribbons to edge cards both connected vs connected one at a time. Also adding some pics of the panel edge boards. Also was able to get voltage reading from the tcon with neither ribbon connected, both connected and one at a time. Now I need to find & check the test points on the edge boards. Man those are tiny.

	TCON Cable Connected			
	Neither	Both	Left	Right
VDD	0	16.37	16.36	16.37
D5	12.66	16.4	16.36	16.38
VCORE10	0	1.04	1.04	1.04
VCC18	1.77	1.8	1.76	1.77
VCOM1	0	6.12	6.11	6.11
VCOM2	0	6.12	6.11	6.11
VCC33	0.71	3.28	3.28	3.28
VGL1	0	-5	-4.98	-4.98
VGL2	0	-9.91	-9.9	-9.9
HVDD	7.92	7.92	7.91	7.92
VGH	0	28	28	28.1

[budwich]

Re: Sony XBR-65X810C Bad Panel?

it would be nice if you would have "titled" your picture with a bit of description so we know what we are looking at. Can you actual do that now in words.

my guess right now is your voltages to your backlights (leds) is not right... maybe.

further, I hope you aren't disconnecting / connecting cables with the power on.

certainly the white line off center is cause for "despair". With the tcon disconnected from one side, I am not how anything can happen on that side besides either black or all white... maybe its a sony thing.

I was hoping that to see a disconnectable cable on the edge boards either going between bottom boards or between the bottom and side... but I don't know what I am looking at in those pictures. :-(

[freakaftr8]

Re: Sony XBR-65X810C Bad Panel?

This is interesting. I would say either your tcon is not interpreting signals from mainboard or mainboard is bad. Most likely tcon. However, that line in the screen is bad panel, gate driver. Try pressing on gate driver where it imbexs into panel and see if that line goes away.

[toddw65]

Re: Sony XBR-65X810C Bad Panel?

Sorry about the previous pics sans description. I was trying to get the detail of the edge boards and didn't think to get the overall picture. Here's a couple of pics with a wider view that should help.

[Davi.p]

Re: Sony XBR-65X810C Bad Panel?

Hi, the tcon voltages are surely all in order, the strange thing in Sony tvs, like freakaftr8 thread, is that with panel disconnected tcon is "disabled". For the last pictures of video i guess n.1 is with no panel connected, n.2 right half connected, n.3 left half.
I don't agree with budwich, is surely not a backlight problem.
I don't agree with freakaftr8 when he says bad side driver for that vertical band, vertical things are pertinence of source drivers (the horizontal tabs). Or it can be corrosion,
for instance my thought is bad panel for visibly corrosion on the central right tab visible on the second "panel's board" picture (that white substance)
MORAL: "never wash tvs like a car"..