Sony x930D , half screen grey bars

[workingisgood]

Half the screen is grey bars, looks like a greyscale color test. After a while the backlight in that region goes down and it almost becomes black, I'm guessing because the other side is a black screen.

That side works just fine. The bars are evenly spaced, no irregularity.

Think this can be fixed? Loose connection or bad t-con? I'm worried it could be the panel yet I dont know what a panel failure truly looks like.

[Nick's Tvs]

Re: Sony x930D , half screen grey bars

If you could take a picture of the screen when it is malfunctioning, it would help us understand what you are describing.

[workingisgood]

Re: Sony x930D , half screen grey bars

https://www.dropbox.com/s/hoi7nu2xxf...08.08.png?dl=0

Depending on whats on the screen, the colors will change.

[workingisgood]

Re: Sony x930D , half screen grey bars

If you could take a picture of the screen when it is malfunctioning, it would help us understand what you are describing.

Does that look like one of the top ribbon cables is messed up or the connection going to that whole side from the t-con?

Thanks

[workingisgood]

Re: Sony x930D , half screen grey bars

Upon looking very closely, I can see a row after row of very faint horizontal lines as well. Almost missed them.

Does this signify its a bad panel? Or could it be one of the boards?

[nomoresonys]

Re: Sony x930D , half screen grey bars

Well easy stuff first,
clean the ribbon cables of tcon with isopropyl alcohol and reseat and make sure the lvds cable from mainboard to tcon is clean and secure.

[workingisgood]

Re: Sony x930D , half screen grey bars

Well easy stuff first,
clean the ribbon cables of tcon with isopropyl alcohol and reseat and make sure the lvds cable from mainboard to tcon is clean and secure.

Does that problem there I have, look like something that is caused by that. Now all the bars are grey, so they have changed color a bit. The T-CON board is under the mainboard, so its going to be a bit of a process for me.

I mean, I dont know what a bad panel looks like, does it fail in this manner or some other way usually?

[nomoresonys]

Re: Sony x930D , half screen grey bars

It's strange with tvs, you can't always, I should say very seldom tell what's exactly wrong just by what is displayed, I've seen them look like it was for sure a bad panel but a new tcon was the fix and vice versa, you have one of those where the tcon is tougher to get to but you may need to access it for testing.

[nomoresonys]

Re: Sony x930D , half screen grey bars

Examples of bad panels: https://www.google.com/search?q=faul...=firefox-b-1-d

[nomoresonys]

Re: Sony x930D , half screen grey bars

Examples of bad tcons, as you can see it's not easy to tell the difference: https://www.google.com/search?q=faul...=firefox-b-1-d

[workingisgood]

Re: Sony x930D , half screen grey bars

https://www.youtube.com/watch?v=mpp14G-c9Yo

That looks like excactly whats happening right now. Only at one point the bars were different colors, now they are all grey like that.

Only in my case its a much larger tv and a Sony.

[nomoresonys]

Re: Sony x930D , half screen grey bars

To check for that you need to partial disassemble down to those tabs and use slight pressure like he's doing, those are faulty tab bond/s, no easy fix for those but some have good luck with "shimming" a lot of videos on youtube on that process. That's another fault that is hard to distinguish from the others mentioned, just by looking at the display.

[workingisgood]

Re: Sony x930D , half screen grey bars

I guess its all worth a try. It's just it can be anything from t con to motherboard to bad panel, its hard to isolate where the issue could be coming from.

its a 65 inch screen, really thin, something tells me getting that frame off is going to be a challenge.

[nomoresonys]

Re: Sony x930D , half screen grey bars

Yep, seems the bigger the panel the more flimsy and easy to break they are, I like to start with the voltage testing number 3 below to try to get some kind of info on what to do next.

[nomoresonys]

Re: Sony x930D , half screen grey bars

See if there's any videos on youtube of backlight replacement for your model, not that you probably need backlights but because they tear the whole tv apart to get to them so you can see the whole process of how they tear them down.

[workingisgood]

Re: Sony x930D , half screen grey bars

Going to try and go as low tech as possible here. I'm not an electronics guru, and I dont want to get a capacitor shock. I know its not like a CRT but still, want to avoid it if I can.

Just probing with my multimeter I'm scared I'll short something. So I want to be extra cautious

[workingisgood]

Re: Sony x930D , half screen grey bars

See if there's any videos on youtube of backlight replacement for your model, not that you probably need backlights but because they tear the whole tv apart to get to them so you can see the whole process of how they tear them down.

Hardly no videos on youtube at all about this model, not sure if thats a good thing or bad thing. I mean it was one of their better tv's from 2016

[nomoresonys]

Re: Sony x930D , half screen grey bars

You are right to be cautious, there's DEADLY voltages on the HOT/PRIMARY side of the powerboard.

[workingisgood]

Re: Sony x930D , half screen grey bars

what do you mean deadly? It's still fairly low amp right? When turned off that is.

But yeah, definitely don't want to mess around with the power board much.

[budm]

Re: Sony x930D , half screen grey bars

The main filter caps in the hot side can have up to 400VDC on them, so when you get to the power board after unplugging the TV from the outlet, you should check the Voltage on the caps to see how much it is discharged the Voltage down to, <20V will be OK, but when you have to make the Voltage measurement in the cold side of the circuits you have to make sure not to touch anything, I.E. heatsink, in the hot side with your hands or body. You should at least plug the TV into GFCI outlet to protect yourself.