Toshiba LcD TV 40L1333b sound no picture

[budm]

Re: Toshiba LcD TV 40L1333b sound no picture

So it is inside the panel? That will be real stupid design if they did that.

[Herbssat]

Re: Toshiba LcD TV 40L1333b sound no picture

Hi homer. Please do a search for my post named sanyo dp40142 no backlight. The panel for your set was used in a couple of sets including the phillips 40pfl3107h. The problem is normally bad connections where the backlight strips connect and possibly led driver board problems. I would recommend that you duplicate all connections inside the panel at the point where the strips meet first and see if that solves it.

[homer10]

Re: Toshiba LcD TV 40L1333b sound no picture

i have checked the the out put of LED driver board its putting out 118.1mv

[homer10]

Re: Toshiba LcD TV 40L1333b sound no picture

pics

[homer10]

Re: Toshiba LcD TV 40L1333b sound no picture

now the light filckers when powered up

[tom66]

Re: Toshiba LcD TV 40L1333b sound no picture

Have you checked the fuse F001?

[homer10]

Re: Toshiba LcD TV 40L1333b sound no picture

thanks every 1 the back light is working now i could not have done it without you


it was these little connectors i gave them a clean now it works

[homer10]

Re: Toshiba LcD TV 40L1333b sound no picture

Hi homer. Please do a search for my post named sanyo dp40142 no backlight. The panel for your set was used in a couple of sets including the phillips 40pfl3107h. The problem is normally bad connections where the backlight strips connect and possibly led driver board problems. I would recommend that you duplicate all connections inside the panel at the point where the strips meet first and see if that solves it.

this was a big help

[homer10]

Re: Toshiba LcD TV 40L1333b sound no picture

OK, what DC Voltage do you have on the two legs of the main filter caps (47uF 450VDC) and on the two legs of the filter caps (1000uF 35V) of the LED driver circuit?

and you budm

[homer10]

Re: Toshiba LcD TV 40L1333b sound no picture

and now i have cracked the screen aaaaaaaaaaaaahhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

[homer10]

Re: Toshiba LcD TV 40L1333b sound no picture

aaaaaaaaaaaaaaaaaaaaaaaaaaaahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

[selldoor]

Re: Toshiba LcD TV 40L1333b sound no picture

Nooooooooooooooooooooooooooo!!!

[Herbssat]

Re: Toshiba LcD TV 40L1333b sound no picture

What rotten luck. How did you do that? I was extra careful in handling the screen when i did it for my customer. I am glad that cleaning the connectors got the tv to work again but it would not probably not solve the issue. That is why i recommended to duplicate the connectors with bus wire so the issue would not return. The connectors are poor quality as documented in some russian forums. Its like doing an engine job and not replacing everything while you are that far in. Sure it takes a little more time but worth it. I am glad i could help you though.

[homer10]

Re: Toshiba LcD TV 40L1333b sound no picture

the screen was just out of place when putting screws back in

[Herbssat]

Re: Toshiba LcD TV 40L1333b sound no picture

If you read my post carefully i also made a mistake. I got a little too agressive with one of the strips and it cost me some time. I had to really scramble to recover. Ended up bridging the strip because the only ones that could be found were in russia and could not be shipped to the US. There will be thousands reading these posts and if i could impress anything upon them it would be to not try and pull the strips out of this tv without some heat source. They are glued down hard and the strips are flimsy. Like bud said, the panel is a dumb design. The sanyo that i worked on was sold by a big box store that we all know. Cheap set. I am quite sure your toshiba was not that cheap.

[zomi]

Re: Toshiba LcD TV 40L1333b sound no picture

I used a heatgun set at 150 C and the strips came off very easily.
Just incase any oneneeds to do it in future
Just heat them for about 20secs and then pry them off using constant heat.

[tom66]

Re: Toshiba LcD TV 40L1333b sound no picture

Taking apart LCD screens is not fun. I've broken two myself doing operations on CCFL backlights; looks like LED backlights will require even more work. Whose boneheaded idea was it to stick the backlight driver inside the panel? I want to slowly impale them.

[Herbssat]

Re: Toshiba LcD TV 40L1333b sound no picture

Hi Tom and Zomi. Got mine fixed but still not as bright as it should be. Still trying to locate a backlight strip and a driver board to swap in and try. Cant find panel parts for this set anywhere except in russia. LOL.

[kirkyoke]

Re: Toshiba LcD TV 40L1333b sound no picture

Got the same problem as homer10 on the exact same tv (toshiba 40L1333b). I can't seem to split the back part from the screen (the part that houses the invverter board and backlights) Is there any hidden screws i may have missed?
Hope someone can help
Thanks

[Alastair E]

Re: Toshiba LcD TV 40L1333b sound no picture

Taking apart LCD screens is not fun. I've broken two myself doing operations on CCFL backlights; looks like LED backlights will require even more work. Whose boneheaded idea was it to stick the backlight driver inside the panel? I want to slowly impale them.

Yup--Ive seen a few of these Heaps of SHIT!....

All done to make it HARDER to repair--or at least more fraught with errors leading to unrepairable damage as above-- so you HAVE to buy a new set--as if the fragility of LCD Screens wasn't enough!

PLANNED OBSOLESCENCE in action....

Blame the Consumerist Society and corporate GREED--and its gonna get a whole lot worse before it gets better!