Sony Bravia 46XBR4 picture problem

[Rmasters3]

Picked this up recently and initially it worked fine. Last use the screen was dark--images were discernible but much less so than before and adjustments didn't help. No lines, or blank or black areas in display--just dark.

Haven't had a chance to look at it inside--any thoughts?

[Moreno83]

Re: Sony Bravia 46XBR4 picture problem

I would say T-con board.
But could be easily a blown cap on the PS. ( Had that with a grundig lcd ).

Pictures of the tv with the fault would help.

[Rmasters3]

Re: Sony Bravia 46XBR4 picture problem

Attached are some photos. Right side of screen is darker, there has been some flickering when in the Menu or Settings. No lines on display, no lights blinking. One cap a 3300 @25V in the PS is marginally swollen on top where the remainder are perfectly Flat. I tried Vivid and standard Modes, and reverted to factory settings, etc. Contrast changes, but overall the screen is darker than you'd like and right side more so that left. There is some variation top to bottom as well.

[Rmasters3]

Re: Sony Bravia 46XBR4 picture problem

Tried the set again today and after taking the photos I attached above and a 15 -20 minute warm-up, the picture quality is back to normal. Any thoughts?

[tom66]

Re: Sony Bravia 46XBR4 picture problem

This is most likely a panel failure (tab bonding failure) may be fixable with a shim, it depends though.

[nomoresonys]

Re: Sony Bravia 46XBR4 picture problem

a little swollen?, replace the cap, even ones that don't bulge can be bad, no guarantees, but for about a buck a piece, always good policy, as always be careful working with power supply, HIGH VOLTAGE, on primary side can be deadly.

[Rmasters3]

Re: Sony Bravia 46XBR4 picture problem

I have never shimmed one of these--how does that work? I've been running the set all day and it's fine after warm-up.

[nomoresonys]

Re: Sony Bravia 46XBR4 picture problem

https://www.youtube.com/watch?v=7V-LiOYLYww

[nomoresonys]

Re: Sony Bravia 46XBR4 picture problem

https://www.youtube.com/watch?v=xHst6pKLtTE

[Moreno83]

Re: Sony Bravia 46XBR4 picture problem

I agree with nomoresony's. It has the same fault as the philips 8404 ambilight. You need to use some hard carbon/thick paper and place it between the tabs and cover.
I would also replace that cap , if its not the problem right now then it will be give problems later on

[Rmasters3]

Re: Sony Bravia 46XBR4 picture problem

Thanks, gentlemen, I do appreciate it. I'll work on it in the next few days and give a full report.