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Crumbtrail TV Forums: TV Equipment: TV Repair Forum:
No Back Light On Toshiba 40L1333B

 
 


kierand365
New User

Oct 21, 2015, 3:29 PM

Post #1 of 5 (1906 views)
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No Back Light On Toshiba 40L1333B Can't Post
Hi everyone,
Recently my Toshiba 40l1333b decided as i was watching it, to just turn blank. Sound was still coming through. This is why i believe it to be a back light problem.
I have never taken apart a tv before, so have not clue about what to do next. So far i have taken the back panel off. Ive taken pictures of all areas i felt were important. Any information would be great!

Thank you

Pictures
http://i1380.photobucket.com/albums/ah173/kierand365/IMAG14561_zpsby4epxcr.jpg
http://i1380.photobucket.com/albums/ah173/kierand365/IMAG14572_zps5g0uv9bm.jpg
http://i1380.photobucket.com/albums/ah173/kierand365/IMAG14581_zpsf9sbcuan.jpg
http://i1380.photobucket.com/albums/ah173/kierand365/IMAG14591_zpsfnkbmzat.jpg
http://i1380.photobucket.com/albums/ah173/kierand365/IMAG14601_zps7342fjgu.jpg

anything else you need, let me know



jts1957
Veteran


Oct 21, 2015, 4:21 PM

Post #2 of 5 (1895 views)
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Re: [kierand365] No Back Light On Toshiba 40L1333B [In reply to] Can't Post
Dim image with flashlight near screen?

LEDs are usually wired in series - one goes out, they all go out.
Panel manual indicates 30,000 hours lifespan for LEDs, but I doubt it wants them on 100% duty cycle at 100% intensity. I presume they make their estimations under laboratory conditions.


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Location: Far, Far Away


kierand365
New User

Oct 21, 2015, 4:51 PM

Post #3 of 5 (1891 views)
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Re: [jts1957] No Back Light On Toshiba 40L1333B [In reply to] Can't Post
In Reply To
Dim image with flashlight near screen?

LEDs are usually wired in series - one goes out, they all go out.
Panel manual indicates 30,000 hours lifespan for LEDs, but I doubt it wants them on 100% duty cycle at 100% intensity. I presume they make their estimations under laboratory conditions.
Thanks for the reply!

Yeah looking like a black light driver change is needed


(This post was edited by kierand365 on Oct 21, 2015, 5:35 PM)


kierand365
New User

Oct 21, 2015, 5:23 PM

Post #4 of 5 (1884 views)
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Re: [kierand365] No Back Light On Toshiba 40L1333B [In reply to] Can't Post
Cant seem to find one for my tv? any ideas


jts1957
Veteran


Oct 21, 2015, 5:50 PM

Post #5 of 5 (1876 views)
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Re: [kierand365] No Back Light On Toshiba 40L1333B [In reply to] Can't Post
Well there's an idea from long ago. Just attach one of those velvet painting pieces to front and shine a black light at it. Crazy

based upon number in one of your photos:
http://www.ebay.com/...OC-T12-/160860942584


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Location: Far, Far Away

(This post was edited by jts1957 on Oct 21, 2015, 5:51 PM)

 
 
 


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