Sony Bravia KDL-46W5500 replaced T-con still the same

[Kaloo]

Hi guys,

I've been trying to troubleshoot my dad's Bravia (I'm in Australia and he is in France... skype is handy!).

Here are a couple of shots of the problem. TV is 5 years old. When first switched on it looks normal, then 5 mn later the bad picture occurs. I made him run a self test which showed a t-con error. So ordered a new one and now selft test shows no problem with the T-con but image is still bad.

We tried the freezing method with no result, we check all the connectors, rubbons, including the one soldered on the lcd and no change. We blow hot air on the different boards with no result. The power board has been check and show normal voltage.

Is there any one on that forum who knows if it could be the main board, or is it a lcd failure.

Thanks for your help.

[Pragmatiko]

Re: Sony Bravia KDL-46W5500 replaced T-con still the same

Hi, this is a display issue. ��

[nomoresonys]

Re: Sony Bravia KDL-46W5500 replaced T-con still the same

Hi, this is a display issue. ��

hello, does this mean he needs another mainboard or tcon or do you think the panel is bad?, thanks.

[tom66]

Re: Sony Bravia KDL-46W5500 replaced T-con still the same

Looks like a bad panel...

[Pragmatiko]

Re: Sony Bravia KDL-46W5500 replaced T-con still the same

... BAD PANEL

[saddle_au]

Re: Sony Bravia KDL-46W5500 replaced T-con still the same

Open up the TV, it's involved and will take a while (> 1hr). You need to get to the ribbons on the top of the panel (between the panel and the attached panel drive pcb). This means disassembling lots of stuff in the back of the tv to get to the panel. You need to remove the metal surround holding the lcd panel to the backlight panel. Turn the tv on and get an image up then press the ribbons between the panel and that pcb with a paper card (like a business card). There is a small grove under that cable that runs along the top of the screen. Find the cable that is causing this (could be more than one). The chip on film is bad and needs a bit of pressure. Stick something on the cable between the metal frame and the top of the cable and screw it back down. Have tried this on many KDL46'ers and the previous models 46X3100, 46W3100 etc..

Warnings though, there's a lot to go wrong. Too much pressure in the wrong spot and you risk cracking the screen. Any slipping when turning this unit over while in a disassembled state also risks cracking the panel. Mains is present and needs to be on while the TV is open and on it's back and it's dangerous as well as the high voltage bits supplying the backlights. You need two people (one that can resus if necessary) to move this unit unless you have a rotating frame made for this. Sometimes the metal screw locations are just too far away to guarantee pressing support, so you need to get creative with the metal and plastic (maybe add one).

[Pragmatiko]

Re: Sony Bravia KDL-46W5500 replaced T-con still the same

the cause is correct but this solution is unstable...

[nomoresonys]

Re: Sony Bravia KDL-46W5500 replaced T-con still the same

Open up the TV, it's involved and will take a while (> 1hr). You need to get to the ribbons on the top of the panel (between the panel and the attached panel drive pcb). This means disassembling lots of stuff in the back of the tv to get to the panel. You need to remove the metal surround holding the lcd panel to the backlight panel. Turn the tv on and get an image up then press the ribbons between the panel and that pcb with a paper card (like a business card). There is a small grove under that cable that runs along the top of the screen. Find the cable that is causing this (could be more than one). The chip on film is bad and needs a bit of pressure. Stick something on the cable between the metal frame and the top of the cable and screw it back down. Have tried this on many KDL46'ers and the previous models 46X3100, 46W3100 etc..

Warnings though, there's a lot to go wrong. Too much pressure in the wrong spot and you risk cracking the screen. Any slipping when turning this unit over while in a disassembled state also risks cracking the panel. Mains is present and needs to be on while the TV is open and on it's back and it's dangerous as well as the high voltage bits supplying the backlights. You need two people (one that can resus if necessary) to move this unit unless you have a rotating frame made for this. Sometimes the metal screw locations are just too far away to guarantee pressing support, so you need to get creative with the metal and plastic (maybe add one).

seems similar to loose tab bond issues.

[Pragmatiko]

Re: Sony Bravia KDL-46W5500 replaced T-con still the same

seems similar to loose tab bond issues.

is tab bond issue

[tom66]

Re: Sony Bravia KDL-46W5500 replaced T-con still the same

This is not a tab bond issue it is plain jane panel failure, like every Samsung based TV...

[Kaloo]

Re: Sony Bravia KDL-46W5500 replaced T-con still the same

Thanks for all your answer...

The ribbons around the lcd have all been tested and do not show any change when pressured.

What is strange is how it takes a bit more of 5 minutes after the TV is turned on for the lcd to show the symptoms. At the beginning the bad image starts on the right side and slowly appear on all the frame. If contrast and luminosity is set to the minimum, then the image remains good.