Sony Bravia no picture but backlight on

[xmikee]

Re: Sony Bravia no picture but backlight on

Just add your pictures to this thread.

PlainBill

hi could you help with problem below, Update sound works, no backlight, no video. thx Ps. my tv is a KDL 52X3500 AKA KDL 52XBR

[xmikee]

Re: Sony Bravia no picture but backlight on

unplugged from power for safety sakes!

Yes all these medium to big ones brown-purplish look blocks on T-CON. Rest of other boards don't worry about those yet.

Cheers, Wizard

Hi could you help, i recently attempted to do a TAB DOND FIX ON MY kdL52X350, All went well until one of the metal clips touched the circuit board that holds the metal frame around LCD panel, Now the backlight does not work and also no picture, The sound is ok. What do you think would of been damged. The TAB Panel, Tcon Board, LCD board that connects to Tcon, Any advice would be great. thank you.

[BCR]

Re: Sony Bravia no picture but backlight on

Cool thanks, and thanks..
Looking at average the part goes for around 120.00 so not to bad if it is the correct part to fix.
EDIT Where abouts in Florida?

[Wrog]

Re: Sony Bravia no picture but backlight on

Rules of the pics. Ideally you would get them as close to 2000x2000 as possible (maximum dimension on one side) so that we can see the details.

The top connector is fragile -- the black part swings up to a 90 degree angle and the cable slides out.

[BCR]

Re: Sony Bravia no picture but backlight on

OK here is the TV-Cont. board, which one is the fuse that I should check????
Also what is the best way to get those top cables off? The bottom one you just squeeze on the sides, but not the top ones...

[BCR]

Re: Sony Bravia no picture but backlight on

OK, not sure on the rules of pics here. but I sized them to 800x600 and have many....
Here are some of the pics, any close ups needed just say so. Thanks...

[PlainBill]

Re: Sony Bravia no picture but backlight on

Should I just start a new thread with my pics??

EDIT:: Or just post pics here?

Just add your pictures to this thread.

PlainBill

[BCR]

Re: Sony Bravia no picture but backlight on

Should I just start a new thread with my pics??

EDIT:: Or just post pics here?

[BCR]

Re: Sony Bravia no picture but backlight on

The explanation is easy. Finding the bad solder joint is the hard part. The good news is the harder it is to find, the greater your sense of accomplishment when you succeed.

PlainBill

Thanks for the info, I may just give this to a Pro (if it can be done for under 500.00 with 30 day warranty)
Sadly, I had just missed a fellow on eBay with same TV that had a cracked screen, he was selling all the boards at 0.99 starting price. I should have bought all of them for well under 500.00 something like 200.00 with shipping would have got them all.

[truep]

Re: Sony Bravia no picture but backlight on

I replaced a sony panel with one from a toshiba once. Just the LCD portion as the sony was cracked. Check the number on the circuit board at the top of the lcd panel itself not the tcon. Mine had the same part number but a different rev number but it worked! I'm betting it's the main board.

[PlainBill]

Re: Sony Bravia no picture but backlight on

The cable is good, it is a 1 meter cable that I use everyday on the PS3 straight to other TV, but I did try a second cable to be sure. As well, went around every board on TV and checked connections, all look good (some grease, but that is standard).

It doesn't have to be a connector. Lead free solder is notorious for prodicing joints that look good, but are intermittent. When you plugged in the cable you put pressure on the circuit board, causing it to flex slightly. That caused two points to rub across one another and make contact - at least for a while.

The explanation is easy. Finding the bad solder joint is the hard part. The good news is the harder it is to find, the greater your sense of accomplishment when you succeed.

PlainBill

[BCR]

Re: Sony Bravia no picture but backlight on

The cable is good, it is a 1 meter cable that I use everyday on the PS3 straight to other TV, but I did try a second cable to be sure. As well, went around every board on TV and checked connections, all look good (some grease, but that is standard).

[PlainBill]

Re: Sony Bravia no picture but backlight on

Got same problem on the 52" version. So I will keep tabs on this, for when I get around to getting new T-Con board.

Same thing, as first poster, BL works fine, actually even picture came on once just from moving connectors, get audio out from all the HDMI jacks, but no picture.

That indicates a bad connection - either the cable itself, or on the board the cable connected to.

PlainBill

[BCR]

Re: Sony Bravia no picture but backlight on

Got same problem on the 52" version. So I will keep tabs on this, for when I get around to getting new T-Con board.

Same thing, as first poster, BL works fine, actually even picture came on once just from moving connectors, get audio out from all the HDMI jacks, but no picture.

[bobbyvalentino1978]

Re: Sony Bravia no picture but backlight on

how do i verify the voltage?

[Wizard]

Re: Sony Bravia no picture but backlight on

Panel totally failed sorry to say. Also make sure the LCD voltage is 5 or 12V is within range. If not. Time for a another panel or new TV.

Cheers, Wizard

[bobbyvalentino1978]

Re: Sony Bravia no picture but backlight on

So, I got the replacement board, installed it but the fuse popped again.
Can any other board be burning the fuse?

[bobbyvalentino1978]

Re: Sony Bravia no picture but backlight on

I wish I have the same luck. I'll post the outcome when I get my board and install !

[Wizard]

Re: Sony Bravia no picture but backlight on

Awesome! I knew that would fix this (higher chance of success).

Cheers, Wizard

[capxrf]

Re: Sony Bravia no picture but backlight on

HEY HEY!! I got my T-Con board today. 15 minutes later I was looking at one snazzy working tv. I still don't know what was wrong with the old board, but at least with all your help I narrowed it down.

Thanks a lot everybody for your help!


and best of luck fixing your own